Docs: Add "Data Integration" section in winning-over-developers.md (#20187)
Docs: Add "Data Integration" section in winning-over-developers.md (#20187)

* Update winning-over-developers.md

Changes to the 'winning over developers' documentation to add a new sub topic 'Data Integration' which specifically points out easy data integration, which is a main source of motivation to developers.

* Update docs/docs/winning-over-developers.md

Co-Authored-By: LB <barth.laurie@gmail.com>

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

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