Updating 404.html Allows users to report broken links.
Updating 404.html
Allows users to report broken links.

This closes #9.

ankur-gupta/trio,loicdtx/blog,shreyas123/shreyas123.github.io,loicdtx/blog,shreyas123/shreyas123.github.io,ankur-gupta/trio,shreyas123/shreyas123.github.io,shreyas123/shreyas123.github.io