Update stale.yml

Author: vvaezian

.github/workflows/stale.yml

@@ -23,4 +23,5 @@ jobs:
           stale-pr-message: "This PR is stale because it has been open for 30 days with no activity."
           close-pr-message: "This PR was closed because it has been inactive for 14 days since being marked as stale."
           exempt-all-assignees: true
+          exempt-draft-pr: true
           repo-token: ${{ secrets.GITHUB_TOKEN }}