Update installation command for libegl1 in GitHub Actions workflow

Author: PierreRaybaut

.github/workflows/test-PyQt6.yml

@@ -32,7 +32,7 @@ jobs:
     - name: Install dependencies
       run: |
         sudo apt install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils
-        sudo apt install libegl1-mesa libxcb-cursor0
+        sudo apt install libegl1 libxcb-cursor0
         /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1920x1200x24 -ac +extension GLX
         python -m pip install --upgrade pip
         python -m pip install flake8 pytest