Preinstall PyQt Qt6 & sip to speed up PyQt6 wheel build

Author: matthewyang204

.github/workflows/build-linux.yml

@@ -44,6 +44,7 @@ jobs:
     - name: Install dependencies
       run: |
         python3 -m pip install --upgrade pip
+        pip3 install PyQt6-Qt6==6.9.2 PyQt6_sip==13.10.2
         pip3 install -r requirements.txt -U
     
     - name: Build Exe