Improve helper message for the GDPR banner parameter

[fellyph]

Description

This pull request is related to issue #843, updating the helper message for the option --button-selectors

Relevant Technical Choices

Standardize the name convention for the technologies listed and use better wording on the CLI messages.

Testing Instructions

1. install PSAT CLI
2. Run the command npm run cli -- -h
3. Check the message

Additional Information:

Screenshot/Screencast

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Checklist

• [ ] I have thoroughly tested this code to the best of my abilities.
• [ ] I have reviewed the code myself before requesting a review.
• [ ] This code is covered by unit tests to verify that it works as intended.
• [ ] The QA of this PR is done by a member of the QA team (to be checked by QA).

Fixes #843