fix(CI/PyQt6): add libegl1 dependency for Xvfb setup in testing workflow

Author: PierreRaybaut

.github/workflows/test_pyqt6.yml

@@ -46,7 +46,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - 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 libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils libegl1
         /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 ruff pytest
@@ -122,7 +122,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y \
           libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 \
-          libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils
+          libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils libegl1
 
         /sbin/start-stop-daemon --start --quiet \
           --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background \