Revert "Update SonicGarden/rspec-report-action action to v6 (#344)"

This reverts commit a666f0d.

Author: ryanwi

.github/actions/test-ruby/action.yml

@@ -145,7 +145,7 @@ runs:
 
     - name: RSpec Report
       if: always()
-      uses: SonicGarden/rspec-report-action@v6
+      uses: SonicGarden/rspec-report-action@v5
       with:
         token: ${{ env.GITHUB_TOKEN }}
         json-path: tmp/rspec_results.json