Add release brances to CI

Author: ethanwharris

.github/workflows/ci-install-pkg.yml

@@ -3,9 +3,9 @@ name: Install package
 # see: https://help.github.com/en/actions/reference/events-that-trigger-workflows
 on: # Trigger the workflow on push or pull request, but only for the master branch
   push:
-    branches: [master]
+    branches: [master, "release/*"]
   pull_request:
-    branches: [master]
+    branches: [master, "release/*"]
 
 jobs:
   pkg-check: