✅ Add timeouts to CI workflow

Author: nevans

.github/workflows/test.yml

@@ -26,6 +26,7 @@ jobs:
           - { ruby: head, os: windows-latest, experimental: true }
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.experimental }}
+    timeout-minutes: 15
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby
@@ -36,6 +37,7 @@ jobs:
         rubygems: 3.5.14
     - name: Run test
       run: bundle exec rake test
+      timeout-minutes: 5 # _should_ finish in under a minute
 
     - uses: joshmfrankel/simplecov-check-action@main
       if: matrix.os == 'ubuntu-latest' && github.event_name != 'pull_request'