build(deps): bump pyvista/setup-headless-display-action from 3 to 4

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]>

Author: dependabot[bot]

.github/workflows/ci_cd.yml

@@ -72,7 +72,7 @@ jobs:
     needs: [docs-style]
     steps:
     - name: Setup headless display
-      uses: pyvista/setup-headless-display-action@v3
+      uses: pyvista/setup-headless-display-action@v4
 
     - name: "Run Ansys documentation building action"
       uses: ansys/actions/doc-build@v9