Bump pyvista/setup-headless-display-action from 3 to 4 in the actions group (#13239)

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -89,7 +89,7 @@ jobs:
           persist-credentials: false
       - run: ./tools/github_actions_env_vars.sh
       # Xvfb/OpenGL
-      - uses: pyvista/setup-headless-display-action@v3
+      - uses: pyvista/setup-headless-display-action@v4
         with:
           qt: true
           pyvista: false