Update jurplel/install-qt-action version in build_cmake.yml (flameshot-org#3857)

`jurplel/install-qt-action` provides a fix to Windows 2019 runners in commit `fc214ccc2dadadaebf48e8e5ed6ff4297dfbb732`, which is in `v4`.

This fix will prevent our CI runs from failing, as they attempt to run with python 3.13 and that causes issues.

Author: volovikariel

.github/workflows/build_cmake.yml

@@ -107,7 +107,7 @@ jobs:
           key: ${{ runner.os }}-QtCache
 
       - name: Install Qt
-        uses: jurplel/install-qt-action@v2
+        uses: jurplel/install-qt-action@v4
         with:
           version: 5.15.2
           target:  desktop