Pin activesupport to version < 8.0 in Gemfile for compatibility with Ruby 3.1.7 and update Gemfile.lock accordingly.

Gemfile

@@ -5,6 +5,9 @@ gem 'github-pages', group: :jekyll_plugins
 gem 'jekyll-feed', '~> 0.12'
 gem 'jekyll-sitemap'
 
+# Pin activesupport to be compatible with Ruby 3.1.7 (GitHub Pages)
+gem 'activesupport', '< 8.0'
+
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
 platforms :mingw, :x64_mingw, :mswin, :jruby do

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (8.0.3)
+    activesupport (7.2.2.2)
       base64
       benchmark (>= 0.3)
       bigdecimal
@@ -13,7 +13,6 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-      uri (>= 0.13.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     base64 (0.3.0)
@@ -275,6 +274,7 @@ PLATFORMS
   x86_64-linux-gnu
 
 DEPENDENCIES
+  activesupport (< 8.0)
   github-pages
   http_parser.rb (~> 0.6.0)
   jekyll-feed (~> 0.12)