Fix: pipeline reports missing secret detection report

What does this MR do and why?

Add missing secret detection report column in vuln count summaries.

/cc @prajnamas @orozot @qk44077907

Credit

It was originally fixed by @mtan-gitlab, and submitted by me.

Describe in detail what your merge request does and why.

Screenshots or screen recordings

Before

After

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

1. Go to your GDK, and make sure a gitlab-runner is appropriately configured and DAST scanning is configured as well.
2. Create or use an existing project, and add a file with a random private key inside the file.
3. Run a pipeline.
4. Go to the pipeline result and observe.

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.