Update GitHub Actions workflows. (#561)

This PR was automatically generated by the
update-workflows-ecosystem-providers workflow in the pulumi/ci-mgmt
repo, from commit 584f336d188f5bdd50ba9a49066dfcc18c1ac79d.

.github/workflows/comment-on-stale-issues.yml

@@ -0,0 +1,40 @@
+name: "Comment on stale issues"
+
+on:
+  schedule:
+  - cron: "46 4 * * *" # run once per day
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    name: Stale issue job
+    steps:
+    - uses: aws-actions/stale-issue-cleanup@5650b49bcd757a078f6ca06c373d7807b773f9bc #v7.1.0
+      with:
+        issue-types: issues # only look at issues (ignore pull-requests)
+
+        # Setting messages to an empty string causes the automation to skip that category
+        ancient-issue-message: "Unfortunately, it looks like this issue hasn't seen any updates in a while. If you're still experiencing this issue, could you leave a quick comment to let us know so we can prioritize it?"
+        ancient-pr-message: ""
+        stale-issue-message: ""
+        stale-pr-message: ""
+
+        # These labels are required
+        stale-issue-label: awaiting-feedback # somewhat confusingly, this is also used for when labeling "ancient" issues
+        exempt-issue-labels: kind/enhancement,kind/task,kind/epic,kind/engineering, awaiting-upstream # only run on kind/bug for now, ignore awaiting-upstream too.
+        stale-pr-label: no-pr-activity # unused because we aren't processing PRs
+        exempt-pr-labels: awaiting-approval # unused because we aren't processing PRs
+        response-requested-label: response-requested # unused because we don't set a "stale-issue-message" above
+
+        # Issue timing
+        days-before-close: 10000 # this action lacks the option not to close, so just set this indefinitly far in the future
+        days-before-ancient: 180 # 6 months
+
+        # If you don't want to mark a issue as being ancient based on a
+        # threshold of "upvotes", you can set this here. An "upvote" is
+        # the total number of +1, heart, hooray, and rocket reactions
+        # on an issue.
+        minimum-upvotes-to-exempt: 2
+
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        loglevel: DEBUG