[kiwitaco]

Add a title header to make the page searchable in docs

[greptile-apps]

Confidence Score: 5/5

[Low impact] This PR appears safe to merge.

Summary

Adds a page title and description to devjam.md. No actionable issues found.

• The DevJam guide has its own title and summary in the docs site.

_{Reviews (1) · Last reviewed commit: "Update devjam.md" · Reviewed by Greptile}