Merge #329: doc: Add qml-module-qt-labs-settings to runtime dependencies

6c5b93c qml, doc: Add `qml-module-qt-labs-settings` to runtime dependencies (Hennadii Stepanov)

Pull request description:

  Otherwise, on Ubuntu 23.04:
  ```
  $ ./src/qt/bitcoin-qt
  ...
  QQmlApplicationEngine failed to load component
  qrc:/qml/pages/main.qml:8:1: module "Qt.labs.settings" is not installed
  ~InitExecutor : Stopping thread
  ~InitExecutor : Stopped thread
  ```

ACKs for top commit:
  jarolrod:
    ACK 6c5b93c

Tree-SHA512: 57f945dac74c21600173e738ddd07f4f13f5c59b3d143fd4208b7a077d155ccc92b17731eec8702229e712ff61a1f24ee09b383aee7047fd8b285bdb47b752db

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: