Bump version to 6.13.0


Change-Id: I63790a12e9734c478bb9f0bb86ff4527cd69b9e1
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>
commit5d592b2aa30609b23c3c92845d9a9aebaa1eb1c8
parentae08a87fc41c23e43d0f5c96c515075b8ef5e63e
authorJani Heikkinen <jani.heikkinen@qt.io>
committerJani Heikkinen <jani.heikkinen@qt.io>
commit timeThu, 4 Jun 2026 21:59:51 +0000