Add openssl to gemfile

Why these changes are being introduced:

The openssl gem is included in the Ruby standard library, but there is a
[bug](ruby/openssl#949) in the included
version (`3.3.0`) that causes it to fail with OpenSSL 3.6.0.

Relevant ticket(s):

N/A.

How this addresses that need:

This includes the openssl gem in the Gemfile, thus installing the latest
version rather than what is provided by standard Ruby. This is
[recommended by openssl gem maintainers](ruby/openssl#949 (comment)).

Side effects of this change:

This is something to remember for future perplexing bugs, because this
issue could happen with any gem included in the Ruby standard library.

Author: jazairi

Gemfile

@@ -10,6 +10,7 @@ gem 'http'
 gem 'importmap-rails'
 gem 'jbuilder'
 gem 'mitlibraries-theme', git: 'https://github.com/mitlibraries/mitlibraries-theme', tag: 'v1.4'
+gem 'openssl'
 gem 'puma'
 gem 'rack-attack'
 gem 'rails', '~> 7.2.0'

Gemfile.lock

@@ -216,6 +216,7 @@ GEM
       racc (~> 1.4)
     nokogiri (1.18.10-x86_64-linux-gnu)
       racc (~> 1.4)
+    openssl (3.3.2)
     parallel (1.27.0)
     parser (3.3.9.0)
       ast (~> 2.4.1)
@@ -418,6 +419,7 @@ DEPENDENCIES
   minitest-reporters
   mitlibraries-theme!
   mocha
+  openssl
   pg
   puma
   rack-attack