Bump version to 6.13.0


Change-Id: Ib52c5285590d489182a7221ca76fc3042e69f197
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>
commit8622c1b8ee68af9768992d36da4d84b00a8c58ea
parent5efed53dcc396059733c44577ce732c35ec8c759
authorJani Heikkinen <jani.heikkinen@qt.io>
committerJani Heikkinen <jani.heikkinen@qt.io>
commit timeThu, 4 Jun 2026 19:25:51 +0000