improve 404 message
improve 404 message

humb1ec0ding/humb1ec0ding.github.io,abhijeetg12/cayman-blog,abhijeetg12/cayman-blog,abhijeetg12/cayman-blog,comicfans/comicfans.github.io,comicfans/comicfans.github.io,assertlab/assertlab.github.io,comicfans/comicfans.github.io,humb1ec0ding/humb1ec0ding.github.io,jmclellan/jmclellan.github.io,humb1ec0ding/humb1ec0ding.github.io,assertlab/assertlab.github.io,jmclellan/jmclellan.github.io,jmclellan/jmclellan.github.io,assertlab/assertlab.github.io