Fix typos

[kianmeng]

Before submitting the PR make sure the following are checked:

• [x] The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• [x] Wrote good commit messages.
• [x] Feature branch is up-to-date with main (if not - merge main into your branch).
• [ ] Added tests.
• [x] Ran mix check.all, it verifies the formatting and runs credo and dialyzer
• [x] Ran mix test
• [ ] Added an entry to the Changelog if the new code introduces user-observable changes. See the changelog entry format.