## Summary

Extends #51311 to JSX in JavaScript files, which uses the same
javascript grammar for both .js and .jsx.

## Changes

- Added (#set! rainbow.exclude) to the three angle bracket patterns in
crates/grammars/src/javascript/brackets.scm, matching the TSX fix in
#51311.

## Before / After

Before: angle brackets in JSX tags receive rainbow colors alongside
`{}`, `()`, `[]`, making every tag visually noisy.

After: only `{}`, `()`, and `[]` receive rainbow colors — angle brackets
are excluded, matching the HTML extension behavior.

Release Notes:

- Fixed angled brackets being included in rainbow bracket highlights for
JavaScript.