Docs: fix spelling mistakes

[dreamorosi]

What were you searching in the docs?

The docs contain a handful spelling mistakes that should be fixed.

As part of this activity we should programmatically lint the README files and detect spelling mistakes.

Is this related to an existing documentation section?

No response

How can we improve?

Fix existing spelling mistakes.

Got a suggestion in mind?

No response

Acknowledgment

• I understand the final update might be different from my proposed suggestion, or refused.

[github-actions]

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