Add nokogiri version constraint for Ruby 3.0+ in main Gemfile

Added conditional nokogiri ~> 1.17.0 constraint in Gemfile for Ruby 3.0+.
Regenerated Gemfile.lock with nokogiri 1.17.2 for Ruby 3.0-3.3 support.

This ensures:
- Ruby 2.7 uses gemfiles/ruby27.gemfile with nokogiri 1.15.7
- Ruby 3.0+ uses main Gemfile with nokogiri 1.17.2

Also fixed cache key logic in CI workflow to properly separate cache
by Ruby version and gemfile.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

.github/workflows/ruby.yml

@@ -44,11 +44,18 @@ jobs:
       - name: Set Gemfile for Ruby 2.7
         if: matrix.ruby == '2.7'
         run: echo "BUNDLE_GEMFILE=${{ github.workspace }}/gemfiles/ruby27.gemfile" >> $GITHUB_ENV
-      - name: Save dummy app ruby gems to cache
+      - name: Save dummy app ruby gems to cache (Ruby 2.7)
+        if: matrix.ruby == '2.7'
+        uses: actions/cache@v3
+        with:
+          path: vendor/bundle
+          key: root-gem-cache-${{ matrix.ruby }}-${{ hashFiles('gemfiles/ruby27.gemfile.lock') }}
+      - name: Save dummy app ruby gems to cache (Ruby 3.0+)
+        if: matrix.ruby != '2.7'
         uses: actions/cache@v3
         with:
           path: vendor/bundle
-          key: root-gem-cache-${{ matrix.ruby }}-${{ hashFiles(env.BUNDLE_GEMFILE || 'Gemfile.lock') }}
+          key: root-gem-cache-${{ matrix.ruby }}-${{ hashFiles('Gemfile.lock') }}
       - name: Install Ruby Gems
         run: bundle check --path=vendor/bundle || bundle _2.4.9_ install --path=vendor/bundle --jobs=4 --retry=3
       - run: yarn

Gemfile

@@ -2,4 +2,9 @@
 
 source "http://rubygems.org"
 
+# Nokogiri version constraints for different Ruby versions
+# Ruby 3.0+ can use nokogiri 1.17.x which provides better compatibility
+# Ruby 2.7 uses gemfiles/ruby27.gemfile with nokogiri 1.15.x
+gem "nokogiri", "~> 1.17.0" if RUBY_VERSION >= "3.0"
+
 gemspec

Gemfile.lock

@@ -171,9 +171,9 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.3)
-    nokogiri (1.15.7-x86_64-darwin)
+    nokogiri (1.17.2-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.7-x86_64-linux)
+    nokogiri (1.17.2-x86_64-linux)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
@@ -186,7 +186,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.10)
     public_suffix (4.0.6)
-    racc (1.6.2)
+    racc (1.8.1)
     rack (2.2.6.4)
     rack-test (2.0.2)
       rack (>= 1.3)
@@ -268,6 +268,7 @@ DEPENDENCIES
   jbuilder
   listen (~> 3.0.0)
   minitest-retry
+  nokogiri (~> 1.17.0)
   package_json
   pry-byebug (~> 3.8.0)
   rails (~> 7.0.7, >= 7.0.7.2)