Bump version to 6.13.0


Change-Id: I43d3c9a60e994e3fa6c239ffe1dfeb7f78145cfa
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>
commitff8caa698aee89fc80dd50237a070bad32673f2b
parent0c1b5d76b15911418aeba6a717ec4bf1bbb19510
authorJani Heikkinen <jani.heikkinen@qt.io>
committerJani Heikkinen <jani.heikkinen@qt.io>
commit timeThu, 4 Jun 2026 05:56:16 +0000