Move stale workflow into workflows directory.

Author: geerlingguy

.github/stale.yml renamed to .github/workflows/stale.yml

@@ -12,8 +12,8 @@ jobs:
     steps:
       - uses: actions/stale@v8
         with:
-          days-before-stale: 90
-          days-before-close: 30
+          days-before-stale: 120
+          days-before-close: 60
           exempt-issue-labels: bug,pinned,security,planned
           exempt-pr-labels: bug,pinned,security,planned
           stale-issue-label: "stale"