Merge pull request #639 from datafold/stale_bot_immunity

exempt issues/prs labeled "stale_immune"

Author: dlawin

.github/workflows/stale.yml

@@ -28,3 +28,5 @@ jobs:
         close-issue-message: "Although we are closing this issue as stale, it's not gone forever. Issues can be reopened if there is renewed community interest. Just add a comment and it will be reopened for triage."
         close-pr-message: "Although we are closing this pull request as stale, it's not gone forever. PRs can be reopened if there is renewed community interest. Just add a comment and it will be reopened for triage."
         close-issue-reason: "not_planned"
+        exempt-issue-labels: "stale_immune"
+        exempt-pr-labels: "stale_immune"