Bump actions/stale from 9 to 10 (#4190)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/stale.yml

@@ -10,7 +10,7 @@ jobs:
     if: "github.repository == 'ESMValGroup/ESMValTool'"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         with:
           days-before-issue-stale: 1080
           days-before-pr-stale: 360