ci: install egl

Author: nim65s

.github/workflows/test.yml

@@ -24,6 +24,8 @@ jobs:
           miniforge-variant: Mambaforge
           miniforge-version: latest
           use-mamba: true
+      - name: Install EGL
+        run: sudo apt-get update && sudo apt-get install -qqy libegl1-mesa libegl1-mesa-dev
       - name: Install pym3t
         run: |
           pip install .