docs(README): minor grammatical improvement

[KyleCartmell]

Resolves #2581

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Before the change?

Current line "In most cases you can use the App or OAuthApp SDK which provide APIs and internal wiring to cover most usecase." is a little confusing and seems to repeat "use case" and maybe suffered some copy/paste damage?

After the change?

"You can use the App or OAuthApp SDKs which provide APIs and internal wiring to cover most use cases."

Pull request checklist

• [X] Tests for the changes have been added (for bug fixes / features)
• [X] Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

no

Please see our docs on breaking changes to help!

• [X] Yes
• [ ] No

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[github-actions[bot]]

:tada: This PR is included in version 3.2.0 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: