chore(deps): bump seanmiddleditch/gha-setup-ninja from 3 to 4 (pybind#4875)

Bumps [seanmiddleditch/gha-setup-ninja](https://github.com/seanmiddleditch/gha-setup-ninja) from 3 to 4.
- [Release notes](https://github.com/seanmiddleditch/gha-setup-ninja/releases)
- [Commits](seanmiddleditch/gha-setup-ninja@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -1052,7 +1052,7 @@ jobs:
         uses: jwlawson/[email protected]
 
       - name: Install ninja-build tool
-        uses: seanmiddleditch/gha-setup-ninja@v3
+        uses: seanmiddleditch/gha-setup-ninja@v4
 
       - name: Run pip installs
         run: |