docs(gatsby-plugin-image): Update readme (#29076)
docs(gatsby-plugin-image): Update readme (#29076)

* docs(gatsby-plugin-image): Update readme

* Update

* Apply suggestions from code review

Co-authored-by: LB <8468275f0d120527324004754c3d088324306866@gatsbyjs.com>

* Changes from review

Co-authored-by: LB <8468275f0d120527324004754c3d088324306866@gatsbyjs.com>
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