Fix dependency package linking

What does this MR do and why?

A follow-up from !124276 (merged) to fix linking to dependency package managers from the blob viewer when viewing package.json files.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Enable the highlight_js_worker feature flag
2. Open a package.json file via the repository file browser
3. The dependency packages should be linked to their respective dependency managers

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.

Related to #391586 (closed)