fix: packages.yaml action is not running on release trigger (#5173)

This commit is a workaround to run the `packages.yaml` action after the release action
Fixes #5137.
Check #5137 for context.

.github/workflows/packages.yaml

@@ -1,8 +1,9 @@
 name: Submit Packages
 on:
-  release:
-    types: [published]
-
+  workflow_run:
+    workflows: [release]
+    types:
+      - completed
 env:
   CODER_VERSION: "${{ github.event.release.tag_name }}"