Update Colos theme submodule
Update Colos theme submodule

Update to
ahaasler/hexo-theme-colos@6b6569db79d9cadea7d32493376956da9899c6fa.

ahaasler/hexo-theme-colos-demo,ahaasler/hexo-theme-colos-multilingual-demo,ahaasler/hexo-theme-colos-multilingual-demo