Update Kamal to 1.9.1 to prep for upgrade to 2

Author: northeastprince

Gemfile.lock

@@ -249,7 +249,7 @@ GEM
       activesupport (>= 5.0.0)
     jmespath (1.6.2)
     json (2.7.2)
-    kamal (1.8.3)
+    kamal (1.9.1)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)