fixup! Upgrade to install-qt-action@v4

Author: hasselmm

.github/workflows/integration.yaml

@@ -57,7 +57,7 @@ jobs:
             arch:     win64_llvm_mingw
 
           - platform: msvc
-            win64_msvc2019_64
+            arch:     win64_msvc2019_64
           - platform: msvc
             version:  '6.8.0'
             arch:     win64_msvc2022_64