Set bundler to 2.7.2

Author: corylown

.github/workflows/ruby.yml

@@ -14,6 +14,7 @@ jobs:
       matrix:
         rails_version: [8.0.1]
         ruby: ["3.4"]
+        bundler_version: ["2.7.2"]
         additional_engine_cart_rails_options: [""]
         additional_name: [""]
         include:
@@ -25,12 +26,13 @@ jobs:
       RAILS_VERSION: ${{ matrix.rails_version }}
       ENGINE_CART_RAILS_OPTIONS: "--skip-git --skip-listen --skip-spring --skip-keeps --skip-kamal --skip-solid --skip-coffee --skip-test --css bootstrap -a propshaft -j importmap ${{ matrix.additional_engine_cart_rails_options }}"
       BLACKLIGHT_VERSION: ${{ matrix.blacklight_version }}
+      BUNDLER_VERSION: ${{ matrix.bundler_version || '2.7.2' }}
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1
         with:
-          bundler: latest
+          bundler: ${{ matrix.bundler_version || '2.7.2' }}
           ruby-version: ${{ matrix.ruby }}
       - name: Install dependencies with Rails ${{ matrix.rails_version }}
         run: bundle install
@@ -44,7 +46,7 @@ jobs:
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@v1
         with:
-          bundler: latest
+          bundler: ${{ matrix.bundler_version || '2.7.2' }}
           ruby-version: 3.2
       - name: Install dependencies with Bundler
         run: bundle install