qml, doc: Add qml-module-qt-labs-settings to runtime dependencies

Author: hebasto

src/qml/README.md

@@ -74,7 +74,7 @@ The following runtime dependencies are also required for dynamic builds;
 they are not needed for static builds:
 
 ```
-sudo apt install qml-module-qtquick2 qml-module-qtquick-controls qml-module-qtquick-controls2 qml-module-qtquick-layouts qml-module-qtquick-window2
+sudo apt install qml-module-qtquick2 qml-module-qtquick-controls qml-module-qtquick-controls2 qml-module-qtquick-layouts qml-module-qtquick-window2 qml-module-qt-labs-settings
 ```
 
 #### Fedora: