maint: bump pyvista/setup-headless-display-action from 3 to 4 (#591)

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

Author: dependabot[bot]

.github/workflows/ci_cd.yml

@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Setup headless display
-        uses: pyvista/setup-headless-display-action@v3
+        uses: pyvista/setup-headless-display-action@v4
 
       - name: "Install mermaid-cli"
         run: npm install -g @mermaid-js/mermaid-cli

.github/workflows/nightly-build.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Setup headless display
-        uses: pyvista/setup-headless-display-action@v3
+        uses: pyvista/setup-headless-display-action@v4
 
       - uses: actions/checkout@v4