ci(dependabot): bump pyvista/setup-headless-display-action from 3 to 4 (#102)

Bumps [pyvista/setup-headless-display-action](https://github.com/pyvista/setup-headless-display-action) from 3 to 4.
- [Release notes](https://github.com/pyvista/setup-headless-display-action/releases)
- [Commits](pyvista/setup-headless-display-action@v3...v4)

---
updated-dependencies:
- dependency-name: pyvista/setup-headless-display-action
  dependency-version: '4'
  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

@@ -46,7 +46,7 @@ jobs:
       - name: Run min test
         run: uv run --no-dev --group test_min pytest -v
 
-      - uses: pyvista/setup-headless-display-action@v3
+      - uses: pyvista/setup-headless-display-action@v4
         with:
           qt: true