fix(help): remove double prefix in 'help' on non-existent command

[Ow0cast]

Description

"usage" contained prefix, which is added later on, resulting in the prefix showing up twice when '$help' is used on a non-existent command (ie '$help asdfasdfasdf')

Guidelines

• My code follows the style guidelines of this project (formatted with Ruff)

• I have performed a self-review of my own code

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• I have made corresponding changes to the documentation if needed

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• [x] I have followed all of these guidelines.

How Has This Been Tested? (if applicable)

personally dont think this is applicable as its more or less a documentation change

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Additional Information

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Summary by Sourcery

Bug Fixes:

• Remove hardcoded dollar-sign prefix from the help usage description

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Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

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