Disable stalled PR workflow

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>

.github/workflows/stalled.yml

@@ -23,7 +23,7 @@ jobs:
           stale-pr-label: 'stalled'
           stale-pr-message: 'This PR is stalled because it has been open for 30 days with no activity. Remove stalled label or comment or this will be closed in 7 days.'
           close-pr-message: 'This PR was closed because it has been stalled for 7 days with no activity.'
-          days-before-pr-stale: 30
-          days-before-pr-close: 7
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
           days-before-issue-stale: -1
           days-before-issue-close: -1