Machine Testable Link for "Redundancy and duplication in code should be avoided" points to different STAR technique

[airbr]

sustainableweb-wsg/guidelines.json

Line 2409 in 83fc886

"testable": "[Machine-testable](https://w3c.github.io/sustainableweb-wsg/star.html#WD06-3)",

This Link in the guidelines.json appears to point to the wrong STAR technique. It points to 6-3 when it seems it should be 5-3.

Found by using the updated JSON with the personal website I made WSG-o-matic

[AlexDawsonUK]

Thanks for spotting this bug, the issue is down to some URLs in the JSON being out of sync post the accessibility guideline being removed and merged with the UX category, I'll ensure this is resolved.

[AlexDawsonUK]

A fix for this has been deployed with the latest pull request.