fix(docs): Update custom Link component by adding `partiallyActive` (#13360)
fix(docs): Update custom Link component by adding `partiallyActive` (#13360)

* fix(docs): Update custom Link component by adding `partiallyActive` option

Updated Custom Link component in gatsby-link page by adding `partiallyActive` option.

* Update gatsby-link.md

* chore: format


Co-authored-by: Michal Piechowiak <9f3259e2eef1b9102300663eaa080e26c8e9c01f@gmail.com>
gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby