Update orca_bot.yml (#4044)

* Update orca_bot.yml

My mistake, now should be fixed. 

ef9ff99

* Update orca_bot.yml

.github/workflows/orca_bot.yml

@@ -57,6 +57,9 @@ jobs:
           close-pr-label: not_planned
           # Remove stale label from PRs on updates
           remove-pr-stale-when-updated: true
+          # PR stale message
+          stale-pr-message: "Orca bot: this PR is stale because it has been open for XX days with no activity."
+          # PR closure message
+          close-pr-message: "Orca bot: This PR was closed because it has been inactive for X days since being marked as stale."
           # Delete branch after closing a stale PR
           delete-branch: true
-