Update the default version to 6.3.0

5 jobs for release
Status Job ID Name Coverage
  External
failed cmb@release-moho-linux-shared-relwithdebinfo+superbuild

running cmb@release-praxis-windows-shared-release+superbuild

14485:25:07

failed cmb@release-moho-linux-shared-relwithdebinfo+superbuild

failed cmb@release-moho-linux-shared-relwithdebinfo+superbuild

failed cmb@release-moho-linux-shared-relwithdebinfo+superbuild

01:06:20