[ChangeLog][qt.conf] The key Paths/Qml2Imports has been renamed to
Paths/QmlImports. For backwards-compatibility, Paths/Qml2Imports is
still accepted and acts as default value for when Paths/QmlImports is
not present.
Fixes: QTBUG-98335
Change-Id: If7ffedd281eb8a87e8ab1a2b69a823e615c33541
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>