Bump version to 6.13.0


Change-Id: I40fa1dd566634dfd9f246a1f3fb00ae67a9621ca
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>
commit9c2145bdc4e42066da945e0bc66b0ced54f602a6
parent9d3f2b64222568205491937a1729998d2a38ccd8
authorJani Heikkinen <jani.heikkinen@qt.io>
committerJani Heikkinen <jani.heikkinen@qt.io>
commit timeThu, 4 Jun 2026 04:41:09 +0000