chore: add Matt Robinson to humans.txt (#48987)

## What kind of change does this PR introduce?

Chore — adds Matt Robinson to `apps/docs/public/humans.txt`, inserted in
alphabetical order (between Matt Johnston and Matt Rossman).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

apps/docs/public/humans.txt

@@ -202,6 +202,7 @@ Márton Boros
 Matthew Hambright
 Matt Hudson
 Matt Johnston
+Matt Robinson
 Matt Rossman
 Matt Smiley
 Matthias Luft