⤵️. Add Redirect from Hacktoberfest to Contribute

[keithrfung]

Feature Request

Add redirect from electionguard.vote/hacktoberfest -> electionguard.vote/contribute

This includes adding the redirects package.
https://github.com/datarobot/mkdocs-redirects
https://squidfunk.github.io/mkdocs-material/deprecations/#redirect

• Install line in make file
  pip install mkdocs-redirects

• Add redirect to mkdocs
  Example: May need changes

plugins:
    - redirects:
        redirect_maps:
            'hacktoberfest.md': 'contribute/index.md'

[abxhr]

I would love to work on this! 🙋‍♂️