chore: update release gem action

Author: bethesque

.github/workflows/release_gem.yml

@@ -30,7 +30,7 @@ jobs:
       with:
         fetch-depth: 0
     - id: release-gem
-      uses: pact-foundation/[email protected].12
+      uses: pact-foundation/[email protected].13
       env:
         GEM_HOST_API_KEY: '${{ secrets.RUBYGEMS_API_KEY }}'
         GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'