Run CI on release branches

Author: fboemer

.github/workflows/ci.yml

@@ -18,9 +18,9 @@ permissions:
 on:
   workflow_dispatch:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "release/**" ]
   pull_request:
-    branches: [ "main" ]
+    branches: [ "main", "release/**" ]
     types: [opened, reopened, synchronize, ready_for_review]
 # Pushing changes to PR stops currently-running CI
 concurrency: