chore(deps): bump seanmiddleditch/gha-setup-ninja in the actions group (#5509)

Bumps the actions group with 1 update: [seanmiddleditch/gha-setup-ninja](https://github.com/seanmiddleditch/gha-setup-ninja).


Updates `seanmiddleditch/gha-setup-ninja` from 5 to 6
- [Release notes](https://github.com/seanmiddleditch/gha-setup-ninja/releases)
- [Commits](https://github.com/seanmiddleditch/gha-setup-ninja/compare/v5...v6)

---
updated-dependencies:
- dependency-name: seanmiddleditch/gha-setup-ninja
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

.github/workflows/ci.yml

@@ -1124,7 +1124,7 @@ jobs:
         uses: jwlawson/actions-setup-cmake@v2.0
 
       - name: Install ninja-build tool
-        uses: seanmiddleditch/gha-setup-ninja@v5
+        uses: seanmiddleditch/gha-setup-ninja@v6
 
       - name: Run pip installs
         run: |