Add specific Gemfile for judoscale-rails against v7.1

Update GH matrix to skip unsupported Ruby versions on Rails 7.2 as well,
(main Gemfile for now) since it requires Ruby 3.1+.

.github/workflows/judoscale-rails-test.yml

@@ -14,6 +14,7 @@ jobs:
       matrix:
         gemfile:
           - Gemfile
+          - Gemfile-rails-7-1
           - Gemfile-rails-7-0
           - Gemfile-rails-6-1
         ruby:
@@ -26,8 +27,14 @@ jobs:
         exclude:
           - gemfile: Gemfile
             ruby: "2.6"
+          - gemfile: Gemfile
+            ruby: "2.7"
+          - gemfile: Gemfile
+            ruby: "3.0"
           - gemfile: Gemfile-rails-7-0
             ruby: "2.6"
+          - gemfile: Gemfile-rails-7-1
+            ruby: "2.6"
     runs-on: ubuntu-latest
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/judoscale-rails/${{ matrix.gemfile }}

judoscale-rails/Gemfile-rails-7-1

@@ -0,0 +1,9 @@
+source "https://rubygems.org"
+
+gemspec name: "judoscale-rails"
+
+gem "judoscale-ruby", path: "../judoscale-ruby"
+gem "railties", "~> 7.1"
+gem "minitest"
+gem "minitest-stub-const"
+gem "rake"