docs: grammar fixes and minor clarifications (#9150)

* Grammar fixes and minor clarifications

* Apply suggestions from code review

There's still a few pending ones that I posted replies on; I'll send those in a separate commit.

Co-authored-by: Joshua Chen <[email protected]>

* Update website/docs/deployment.mdx

Co-authored-by: Joshua Chen <[email protected]>

* Update website/docs/deployment.mdx

* PR 9150: made updates based on comments

* Prettier

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Co-authored-by: Joshua Chen <[email protected]>
Co-authored-by: Sébastien Lorber <[email protected]>