Documentation: CreateShortcut is Windows only

The documentation of CreateShortcut states:
https://doc.qt.io/qtinstallerframework/operations.html
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Creates a shortcut from the file specified by filename to linkname. On Windows, this creates a .lnk file which can have arguments. Furthermore, on Windows, filename can be an HTTP or FTP URL in which case a URL shortcut is created. On Unix, this creates a symbolic link.
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The last statement is incorrect. On Unix this does exactly nothing. The corresponding #else block in src/libs/installer/createshortcutoperation.cpp (createLink) is empty.