Merge pull request microsoft#2614 from microsoft/ci/add-wf-dispatch-to-rp

ci: adds workflow dispatch to release please GHA

Author: baywet

.github/workflows/release-please-gha.yml

@@ -16,6 +16,7 @@ on:
       - main
       - support/v1
       - support/v2
+  workflow_dispatch:
 
 permissions:
   contents: read