chore(docs) Fix merge conflicts after gitbook-bot commit (#7033)

* chore(docs): Mistype & link fix for Core 1 docs (#6915)

* Fixed link to the E2E tests page in the CONTRIBUTING.MD page

* Fix page title for the Source-to-image page

* GitBook: No commit message

* Fix some mistypes / return previous version after gitbook bot commit

* clean up

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Co-authored-by: Hiten Kacha <hiten.kacha@seldon.io>

Author: tyndria