ruby.yml in cached_resource-7.1.0

- old
+ new

@@ -13,11 +13,11 @@
   contents: read
 
 jobs:
   test:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     strategy:
       matrix:
         ruby-version: ['1.9', '2.2', '2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2']
         rails-version: ['4.2', '5.0', '5.1', '6.0', '6.1', '7.0']
@@ -104,6 +104,6 @@
         run: bundle install
         env:
           TEST_RAILS_VERSION: ${{ matrix.rails-version }}
           DEBUG: true
       - name: Run tests
-        run: bundle exec rake
\ No newline at end of file
+        run: bundle exec rake