Change stale bot daysUntilStale to 10 years. (facebookincubator#2798)

Summary:
Unfortunately removing old stale bot configuration has made Stalebot more aggressive rather than turning it off. This change increases window to a large value to effectively disable it.

Pull Request resolved: facebookincubator#2798

Reviewed By: kagamiori

Differential Revision: D40229587

Pulled By: kagamiori

fbshipit-source-id: f65dfb10d20c94ddc773cd708983273ff4c59a18

Author: kgpai

.github/stale.yml

@@ -22,3 +22,16 @@ pulls:
     recent activity. If you'd still like this PR merged, please comment on the PR,
     make sure you've addressed reviewer comments, and rebase on the latest main.
     Thank you for your contributions!
+
+
+issues:
+  daysUntilStale: 3650 # 10 years
+  exemptLabels:
+    - bug
+  markComment: >
+    This issue has been automatically marked as stale because it has not had
+    any activity in the last year. If you feel that this issue is important,
+    add a comment explaining why the issue is still relevant and the stale tag
+    will be removed; otherwise it will be closed in 14 days. This is an attempt to
+    ensure that our open issues remain valuable and relevant so that we can keep
+    track of what needs to be done and prioritize the right things.