feat(buildout): use main branch of kimug because migration code is merged in

Author: bsuttor

sources.cfg

@@ -18,4 +18,4 @@ plone.formwidget.geolocation = git ${remotes:imio}/plone.formwidget.geolocation.
 collective.solr = git ${remotes:imio}/collective.solr.git pushurl=${remotes:imio_push}/collective.solr.git branch=main
 pas.plugins.imio = git ${remotes:imio}/pas.plugins.imio.git pushurl=${remotes:imio_push}/pas.plugins.imio
 collective.upgrade = git ${remotes:collective}/collective.upgrade.git pushurl=${remotes:collective_push}/collective.upgrade.git branch=plone61
-pas.plugins.kimug = git ${remotes:imio}/pas.plugins.kimug.git pushurl=${remotes:imio_push}/pas.plugins.kimug branch=add_migration_to_keycloak
+pas.plugins.kimug = git ${remotes:imio}/pas.plugins.kimug.git pushurl=${remotes:imio_push}/pas.plugins.kimug.git