Update the page to a newer Hugo version

[mmeier86]

Due to Hugo's recent penchant for breaking changes, the page does not build with newer Hugo versions. For example, Hugo v0.139.4, itself not the newest, outputs this error:

ERROR deprecated: .Site.Social was deprecated in Hugo v0.124.0 and will be removed in Hugo 0.140.0. Implement taxonomy 'social' or use .Site.Params.Social instead.

There are likely multiple steps to this:

1. Update the hugo.toml file where necessary
2. Possibly update the insourced geekdocs theme if it is incompatible with the new version
3. Update the netlify.toml to use the new version