Stop testing gem push

Author: jkmassel

.buildkite/gem-push.sh

@@ -9,4 +9,4 @@ gem install --user-install fastlane-plugin-wpmreleasetoolkit-*.gem
 echo "--- :rubygems: Gem Push"
 echo ":rubygems_api_key: ${RUBYGEMS_API_KEY}" >>".gem-credentials"
 chmod 600 ".gem-credentials"
-#gem push --config-file ".gem-credentials" fastlane-plugin-wpmreleasetoolkit-*.gem
+gem push --config-file ".gem-credentials" fastlane-plugin-wpmreleasetoolkit-*.gem

.buildkite/pipeline.yml

@@ -68,7 +68,7 @@ steps:
   #################
   - label: ":rubygems: Publish to RubyGems"
     key: "gem-push"
-    #if: build.tag != null
+    if: build.tag != null
     # Note: We intentionally call a separate `.sh` script here (as opposed to having all the 
     # commands written inline) to avoid leaking a key used in the process in clear in the
     # BUILDKITE_COMMAND environment variable.