Issue-1417: Improve Dask workers placement on AWS | fixing a minor typo

[limacarvalho]

Fixes | Closes | Resolves #

Please remove anything marked as optional that you don't need to fill in. Choose one of the keywords preceding to refer to the issue this PR solves, followed by the issue number (e.g Fixes # 666). If there is no issue, remove the line. Remove this note after reading.

Changes introduced in this PR:

• Fixes related to https://github.com/Quansight/qhub/issues/1417
• A minor typo correction

Types of changes

What types of changes does your PR introduce?

Put an x in the boxes that apply

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds a feature)
• [ ] Breaking change (fix or feature that would cause existing features to not work as expected)
• [ ] Documentation Update
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no API changes)
• [ ] Build related changes
• [ ] Other (please describe):

Testing

Requires testing

• [x] Yes
• [ ] No

In case you checked yes, did you write tests?

• [ ] Yes
• [x] No

Documentation

Does your contribution include breaking changes or deprecations? If so have you updated the documentation?

• [ ] Yes, docstrings
• [ ] Yes, main documentation
• [ ] Yes, deprecation notices

Further comments (optional)

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