chore(gatsby-plugin-page-creator): adding repository field to package.json (#12319)
chore(gatsby-plugin-page-creator): adding repository field to package.json (#12319)

## Description

Added repository field so when seen on the plugin library, it will have the Gatsby logo in the sidebar

## Related Issues

Closes #12317
gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby