Apply stale workflow to draft PRs (#3137)

Author: trask

.github/workflows/stale-pr.yml

@@ -17,14 +17,14 @@ jobs:
       - uses: actions/stale@5f858e3efba33a5ca4407a664cc011ad407f2008 # v10.1.0
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          stale-pr-message: 'This PR was marked stale due to lack of activity. It will be closed in 7 days.'
-          close-pr-message: 'Closed as inactive. Feel free to reopen if this PR is still being worked on.'
+          stale-pr-message: >
+            This PR has been labeled as stale due to lack of activity.
+            It will be automatically closed if there is no further activity over the next 14 days.
           exempt-pr-labels: 'never stale'
-          exempt-draft-pr: true
           # opt out of defaults to avoid marking issues as stale
           days-before-stale: -1
           days-before-close: -1
           # overrides the above only for pull requests
-          days-before-pr-stale: 15
+          days-before-pr-stale: 14
           days-before-pr-close: 7
           operations-per-run: 1000