Update the embedded secret_scanning ruletype used in quickstart

[rdimitrov]

Summary

The following PR updates the embedded secret_scanning ruletype used in quickstart.

Eventually we may want to update the command and reuse the already existing stacklok prefixed ruletype.

Change Type

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 54.762% (-0.003%) from 54.765%
when pulling 8583933 on fix-quick
into 0c76dba on main.