.github/workflows: Update the pull_request trigger for the Go workflow (openshift#224)

Update the Go workflow and update the pull_request trigger to run GHA
checks on any branches to remain consistent with the verify workflow
behavior.

Signed-off-by: timflannagan <[email protected]>
Upstream-repository: api
Upstream-commit: 8e593f1c42b91ec75bf0787a28100a5f31690898

Author: timflannagan

staging/api/.github/workflows/go.yaml

@@ -5,7 +5,7 @@ on:
       - master
   pull_request:
     branches:
-      - master
+      - '**'
   workflow_dispatch:
 jobs:
   build: