Fix secrets templating

Author: abnegate

templates/ruby/.github/workflows/publish.yml.twig

@@ -22,7 +22,7 @@ jobs:
           echo -e "---\n:rubygems_api_key: $RUBYGEMS_TOKEN\n" > ~/.gem/credentials
           chmod 0600 ~/.gem/credentials
         env:
-          RUBYGEMS_TOKEN: ${{ secrets.RUBYGEMS_TOKEN }}
+          RUBYGEMS_TOKEN: {{ '${{ secrets.RUBYGEMS_TOKEN }}' | raw }}
 
       - name: Build gem
         run: gem build {{ spec.title | caseLower }}.gemspec