chore(packages): fix links to package gatsby-cypress

[muescha]

Description

• since gatsby-cypress don't get the "gatsby plugin" status (see comment chore(gatsby): add keyword gatsby-plugin to package.json #20774 (comment)) there is no generated info on /packages ( 404 on https://www.gatsbyjs.org/packages/gatsby-cypress )
• to avoid a 404 i add an exception to point to the npm info page

Note

moving gatsby-cypress from gatsbyDependencies to miscDependencies don't fix the 404 (#20773 (comment))

Related Issues

closes #20773 chore(packages): 404 on gatsby-cypress

[wardpeet]

Thanks muescha! Works like a charm https://build-cede0323-4dde-41bf-883c-80415d7da7ca.gtsb.io/starters/parmsang/gatsby-starter-ecommerce/