Bump middleman and sprockets

Bumps [middleman](https://github.com/middleman/middleman) and [sprockets](https://github.com/rails/sprockets). These dependencies needed to be updated together.

Updates `middleman` from 4.5.1 to 4.6.0
- [Changelog](https://github.com/middleman/middleman/blob/main/CHANGELOG.md)
- [Commits](middleman/middleman@v4.5.1...v4.6.0)

Updates `sprockets` from 3.7.5 to 4.2.1
- [Release notes](https://github.com/rails/sprockets/releases)
- [Changelog](https://github.com/rails/sprockets/blob/main/CHANGELOG.md)
- [Commits](rails/sprockets@v3.7.5...v4.2.1)

---
updated-dependencies:
- dependency-name: middleman
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: sprockets
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -1,7 +1,7 @@
 ruby '>=3.2'
 source 'https://rubygems.org'
 
-gem 'middleman', '4.5.1'
+gem 'middleman', '4.6.0'
 gem 'middleman-syntax', '~> 3.4.0'
 gem 'middleman-autoprefixer', '~> 3.0.0'
 gem 'middleman-sprockets', '~> 4.1.1'
@@ -13,5 +13,5 @@ gem 'nokogiri', '~> 1.18.3'
 gem 'haml', '>= 4.0.5', '< 6.0'
 # Lock sprockets/sass, newer version (4.0.0) uses sassc which leads to an error:
 # "Error: File to import not found or unreadable: normalize."
-gem 'sprockets', '3.7.5'
+gem 'sprockets', '4.2.1'
 gem 'sass', '3.7.4'

Gemfile.lock

@@ -1,103 +1,117 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.8)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+    activesupport (8.0.1)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      tzinfo (~> 2.0)
-    addressable (2.8.6)
-      public_suffix (>= 2.0.2, < 6.0)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     autoprefixer-rails (10.4.13.0)
       execjs (~> 2)
-    backports (3.24.1)
     base64 (0.2.0)
+    benchmark (0.4.0)
+    bigdecimal (3.1.9)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.4)
-    contracts (0.16.1)
-    dotenv (2.8.1)
-    erubis (2.7.0)
-    execjs (2.9.1)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.0)
+    contracts (0.17.2)
+    dotenv (3.1.7)
+    drb (2.2.1)
+    erubi (1.13.1)
+    execjs (2.10.0)
     fast_blank (1.0.1)
-    fastimage (2.3.0)
-    ffi (1.16.3)
+    fastimage (2.4.0)
+    ffi (1.17.1-x86_64-linux-gnu)
     haml (5.2.2)
       temple (>= 0.8.0)
       tilt
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
-    hashie (3.6.0)
-    i18n (1.6.0)
+    hashie (5.0.0)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    kramdown (2.4.0)
-      rexml
-    listen (3.8.0)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.6.6)
     memoist (0.16.2)
-    middleman (4.5.1)
-      coffee-script (~> 2.2)
-      haml (>= 4.0.5)
-      kramdown (>= 2.3.0)
-      middleman-cli (= 4.5.1)
-      middleman-core (= 4.5.1)
+    middleman (4.6.0)
+      middleman-cli (= 4.6.0)
+      middleman-core (= 4.6.0)
     middleman-autoprefixer (3.0.0)
       autoprefixer-rails (~> 10.0)
       middleman-core (>= 4.0.0)
-    middleman-cli (4.5.1)
+    middleman-cli (4.6.0)
       thor (>= 0.17.0, < 1.3.0)
-    middleman-core (4.5.1)
-      activesupport (>= 6.1, < 7.1)
+    middleman-core (4.6.0)
+      activesupport (>= 6.1)
       addressable (~> 2.4)
-      backports (~> 3.6)
       bundler (~> 2.0)
-      contracts (~> 0.13, < 0.17)
+      coffee-script (~> 2.2)
+      contracts
       dotenv
-      erubis
+      erubi
       execjs (~> 2.0)
       fast_blank
       fastimage (~> 2.0)
+      haml (>= 4.0.5)
       hamster (~> 3.0)
-      hashie (~> 3.4)
-      i18n (~> 1.6.0)
+      hashie (>= 3.4, < 6.0)
+      i18n (>= 1.6, < 1.15)
+      kramdown (~> 2.4)
       listen (~> 3.0)
       memoist (~> 0.14)
       padrino-helpers (~> 0.15.0)
       parallel
-      rack (>= 1.4.5, < 3)
+      rack (>= 3)
+      rackup
       sassc (~> 2.0)
       servolux
-      tilt (~> 2.0.9)
+      tilt (~> 2.2)
       toml
-      uglifier (~> 3.0)
+      uglifier (>= 3, < 5)
       webrick
     middleman-sprockets (4.1.1)
       middleman-core (~> 4.0)
       sprockets (>= 3.0)
     middleman-syntax (3.4.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    minitest (5.21.2)
+    minitest (5.25.4)
     nokogiri (1.18.3-x86_64-linux-gnu)
       racc (~> 1.4)
     padrino-helpers (0.15.3)
       i18n (>= 0.6.7, < 2)
       padrino-support (= 0.15.3)
       tilt (>= 1.4.1, < 3)
     padrino-support (0.15.3)
-    parallel (1.24.0)
+    parallel (1.26.3)
     parslet (2.0.0)
-    public_suffix (5.0.4)
+    public_suffix (6.0.1)
     racc (1.8.1)
-    rack (2.2.13)
+    rack (3.1.12)
+    rackup (2.2.1)
+      rack (>= 3)
     rb-fsevent (0.11.2)
-    rb-inotify (0.10.1)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
     redcarpet (3.6.1)
-    rexml (3.3.9)
+    rexml (3.4.1)
     rouge (3.30.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -106,36 +120,37 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
     sassc (2.4.0)
       ffi (~> 1.9)
+    securerandom (0.4.1)
     servolux (0.13.0)
-    sprockets (3.7.5)
-      base64
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
+      rack (>= 2.2.4, < 4)
     temple (0.10.3)
     thor (1.2.2)
-    tilt (2.0.11)
+    tilt (2.6.0)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uglifier (3.2.0)
+    uglifier (4.2.1)
       execjs (>= 0.3.0, < 3)
-    webrick (1.8.2)
+    uri (1.0.3)
+    webrick (1.9.1)
 
 PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
   haml (>= 4.0.5, < 6.0)
-  middleman (= 4.5.1)
+  middleman (= 4.6.0)
   middleman-autoprefixer (~> 3.0.0)
   middleman-sprockets (~> 4.1.1)
   middleman-syntax (~> 3.4.0)
   nokogiri (~> 1.18.3)
   redcarpet (~> 3.6.1)
   rouge (~> 3.30.0)
   sass (= 3.7.4)
-  sprockets (= 3.7.5)
+  sprockets (= 4.2.1)
 
 RUBY VERSION
    ruby 3.2.2p53