Restore manual CLA retry dispatch

Author: clockwork-labs-bot

.github/workflows/retry-cla-assistant.yml

@@ -16,6 +16,12 @@ on:
     types: [completed]
   schedule:
     - cron: "7,22,37,52 * * * *"
+  workflow_dispatch:
+    inputs:
+      pr_number:
+        description: "Pull request number to check"
+        required: true
+        type: number
 
 permissions:
   actions: read