docs: HAHAHUGOSHORTCODE link?

[maxthomas]

hey there! ❤️ the project.

was reading the docs and there's an odd link on the middleware section, specifically: the Source Code bullet on the table of contents has a weird and broken URL.

i looked at the source in the docs folder but couldn't immediately figure it out - i think it's just a hugo reference issue, but not sure.

[aldas]

Probably some problem with template and Hugo (gohugoio/hugo#6081)

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note to self: check page https://echo.labstack.com/middleware/ and bottom of the page "Writing Custom Middleware"

[jmkng]

+1 on this, was a bit thrown off as a new user trying to write some middleware. I don't know much about Hugo but I'll look into this if I have some time.