docs: Remove dollar sign from commands

[barbeau]

Summary:

The $ isn't actually part of the command you need to execute.

IMHO the docs are better without it because it makes it easier to copy/paste if you're familiar with running things from the command line, and is less confusing if you're not as you'll get an error if you include the dollar sign in the command.

Expected behavior:

Docs for commands should include exact commands that can be copy/paste into command line and execute.

Please make sure these boxes are checked before submitting your pull request - thanks!

• Run the unit tests with gradle test to make sure you didn't break anything
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)

[maximearmstrong]

LGTM! Thank you @barbeau