Update tips-and-tricks.md

[engdyn]

Updates the link to unwelcome concepts

[greptile-apps]

Confidence Score: 5/5

One-line link fix; new target file confirmed to exist.

Single URL update to a file that exists; no logic, no risk.

No files require special attention.

_{Reviews (1): Last reviewed commit: "Update tips-and-tricks.md" | Re-trigger Greptile}