Update blender-test.yml

Author: ivan-perevala

.github/workflows/blender-test.yml

@@ -57,6 +57,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y xvfb
+          sudo apt-get install -y libgl1-mesa-glx
           python -m pip install --upgrade pip
           pip install pytest