Stale-bot: Do not mark issues stale when pending maintainer action (#5156)

Only adds stale with labels 'answered,needs info' in issues and 'needs update' in PRs
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

.github/workflows/stale.yml

@@ -15,3 +15,6 @@ jobs:
           days-before-close: 7
           exempt-issue-labels: 'enhancement'
           exempt-all-milestones: true
+          labels-to-remove-when-unstale: 'answered,needs info,needs update'
+          any-of-issue-labels: 'answered,needs info'
+          any-of-pr-labels: 'needs update'