Stalebot config adjustments. (#7936)

* Stalebot config adjustments.

- Different wordings for PRs and issues.
- Extend stale timeout for issues.
- Exempt "Proposal" label.
- Exempt issues in projects and issues with assignees.

* Fix copy/paste error.

.github/stale.yml

@@ -19,11 +19,11 @@
 exemptLabels:
   - Security
   - Bug
+  - Proposal
 
 exemptMilestones: true
-
-# Limit to only `issues` or `pulls`
-# only: pulls
+exemptProjects: true
+exemptAssignees: true
 
 # Label applied when closing
 staleLabel: stale
@@ -33,15 +33,30 @@ pulls:
   daysUntilStale: 60
   daysUntilClose: 7
   markComment: >
-    This pull request/issue has been marked as stale due to 60 days of inactivity.
+    This pull request has been marked as stale due to 60 days of inactivity.
     It will be closed in 1 week if no further activity occurs. If you think
-    that’s incorrect or this pull request/issue requires a review, please simply
-    write any comment. If closed, you can revive the PR/issue at any time and @mention
-    a reviewer or discuss it on the dev@druid.apache.org list.
+    that's incorrect or this pull request should instead be reviewed, please simply
+    write any comment. Even if closed, you can still revive the PR at any time or
+    discuss it on the dev@druid.apache.org list.
     Thank you for your contributions.
   unmarkComment: >
     This pull request/issue is no longer marked as stale.
   closeComment: >
     This pull request/issue has been closed due to lack of activity. If you think that
-    is incorrect, or the pull request/issue requires review, you can revive the PR/issue at
+    is incorrect, or the pull request requires review, you can revive the PR at any time.
+
+issues:
+  daysUntilStale: 280
+  daysUntilClose: 14
+  markComment: >
+    This issue has been marked as stale due to 280 days of inactivity.
+    It will be closed in 2 weeks if no further activity occurs. If this issue is still
+    relevant, please simply write any comment. Even if closed, you can still revive the
+    issue at any time or discuss it on the dev@druid.apache.org list.
+    Thank you for your contributions.
+  unmarkComment: >
+    This issue is no longer marked as stale.
+  closeComment: >
+    This issue has been closed due to lack of activity. If you think that
+    is incorrect, or the issue requires additional review, you can revive the issue at
     any time.