Bump pyvista/setup-headless-display-action from 1 to 2 (#349)

Bumps [pyvista/setup-headless-display-action](https://github.com/pyvista/setup-headless-display-action) from 1 to 2.
- [Release notes](https://github.com/pyvista/setup-headless-display-action/releases)
- [Commits](pyvista/setup-headless-display-action@v1...v2)

---
updated-dependencies:
- dependency-name: pyvista/setup-headless-display-action
  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/docs.yml

@@ -127,7 +127,7 @@ jobs:
           custom-requirements: ${{ inputs.custom-requirements }}
 
       - name: "Setup headless display"
-        uses: pyvista/setup-headless-display-action@v1
+        uses: pyvista/setup-headless-display-action@v2
 
       - name: "Install documentation requirements"
         shell: bash