chore(github): add stalebot-exempt labels (#2225) [skip ci]

* chore(github): add stalebot-exempt labels

* chore(github): also never stale priority:medium

.github/stale.yml

@@ -1,18 +1,44 @@
-# Number of days of inactivity before an issue becomes stale
+# Configuration for probot-stale - https://github.com/probot/stale
+
+# Number of days of inactivity before an Issue or Pull Request becomes stale
 daysUntilStale: 60
-# Number of days of inactivity before a stale issue is closed
+
+# Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
+# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
 daysUntilClose: 7
-# Issues with these labels will never be considered stale
+
+# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
 exemptLabels:
   - pinned
   - security
   - dependencies
-# Label to use when marking an issue as stale
+  - never-stale
+  - priority:high
+  - priority:medium
+
+# Label to use when marking as stale
 staleLabel: stale
-# Comment to post when marking an issue as stale. Set to `false` to disable
+
+# Comment to post when marking as stale. Set to `false` to disable
 markComment: >
   This issue has been automatically marked as stale because it has not had
   recent activity. It will be closed if no further activity occurs. Thank you
   for your contributions.
-# Comment to post when closing a stale issue. Set to `false` to disable
-closeComment: false
+
+# Comment to post when removing the stale label.
+# unmarkComment: >
+#   Your comment here.
+
+# Comment to post when closing a stale Issue or Pull Request.
+# closeComment: >
+#   Your comment here.
+
+# Limit to only `issues` or `pulls`
+# only: issues
+
+# Optionally, specify configuration settings that are specific to just 'issues' or 'pulls':
+pulls:
+  markComment: >
+    This pull request has been automatically marked as stale because it has not had
+    recent activity. It will be closed if no further activity occurs. Thank you
+    for your contributions.