fix: use API key for RubyGems publish instead of OIDC trusted publishing

Author: georgeguimaraes

.github/workflows/release-please.yml

@@ -31,3 +31,6 @@ jobs:
       - uses: rubygems/release-gem@v1
         with:
           await-release: false
+          setup-trusted-publisher: false
+        env:
+          GEM_HOST_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}