ci: exempt assigned issues from stale bot (#1368)

Author: sergeykad

.github/workflows/close-inactive-issues.yml

@@ -21,4 +21,5 @@ jobs:
           close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
           days-before-pr-stale: -1
           days-before-pr-close: -1
+          exempt-all-assignees: true
           repo-token: ${{ secrets.GITHUB_TOKEN }}