ci: use pyvista/setup-headless-display-action (#2574)

avoid longstanding opengl errors from vtk_pathlines_example.py notebook on windows

Author: wpbonelli

.github/workflows/rtd.yml

@@ -136,6 +136,9 @@ jobs:
           compiler: gcc
           version: 13
 
+      - name: Set up headless display
+        uses: pyvista/setup-headless-display-action@v4
+
       - name: Build MODFLOW 6
         working-directory: modflow6
         run: |
@@ -146,13 +149,7 @@ jobs:
 
       - name: Run tutorial and example notebooks
         working-directory: flopy/autotest
-        run: |
-          filters=""
-          if [[ ${{ runner.os }} == "Windows" ]]; then
-            # TODO figure out VTK error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, 1.30, and 1.00 ES
-            filters="not vtk_pathlines"
-          fi
-          pytest -v -n auto test_example_notebooks.py -k "$filters"
+        run: pytest -v -n auto test_example_notebooks.py
 
       - name: Upload notebooks artifact for ReadtheDocs
         if: |