chore(docs): explain "replace" settings for gatsby-link (#10599)
chore(docs): explain "replace" settings for gatsby-link (#10599)

## Description

Doc did not say anything about how to replace, rather than push, to the browser history stack when using the navigate function. I also tried to make the introduction more concise.

## Related Issues

https://github.com/gatsbyjs/gatsby/issues/5910
ChristopherBiscardi/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby