Go documentation is missing reference links

# Documentation style bug: Go documentation missing reference links

## Summary

devdocs.io is missing useful links in Go reference documentation that are very handy when working with package API:

- links to the Go source code implementation for the code
- links to input/output structures

I'm happy to contribute a fix if this is a bug rather than a deliberate choice.

## Actual style

See and how the header does not have links:

## Expected style

Official documentation that has links in the header: https://pkg.go.dev/net/http#Client.Do