Bump kdeldycke/workflows from 2.13.2 to 2.15.1

Bumps [kdeldycke/workflows](https://github.com/kdeldycke/workflows) from 2.13.2 to 2.15.1.
- [Release notes](https://github.com/kdeldycke/workflows/releases)
- [Changelog](https://github.com/kdeldycke/workflows/blob/main/changelog.md)
- [Commits](https://github.com/kdeldycke/workflows/compare/v2.13.2...v2.15.1)

---
updated-dependencies:
- dependency-name: kdeldycke/workflows
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/label-sponsors.yaml

@@ -11,4 +11,4 @@ name: Label sponsors
 jobs:
 
   label-sponsors:
-    uses: kdeldycke/workflows/.github/workflows/label-sponsors.yaml@v2.13.2
+    uses: kdeldycke/workflows/.github/workflows/label-sponsors.yaml@v2.15.1