User description

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

Filter out more obvious FPs

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes

Generated description

Below is a concise technical summary of the changes proposed in this PR:

Enhances the base64 false positive detection regex in the detector_utils.py file to filter out more obvious variables and adds a test case in test_secrets.py.