chore: bump react-syntax-highlighter from 15.5.0 to 15.6.1 in /site

Bumps [react-syntax-highlighter](https://github.com/react-syntax-highlighter/react-syntax-highlighter) from 15.5.0 to 15.6.1.
- [Release notes](https://github.com/react-syntax-highlighter/react-syntax-highlighter/releases)
- [Changelog](https://github.com/react-syntax-highlighter/react-syntax-highlighter/blob/master/CHANGELOG.MD)
- [Commits](react-syntax-highlighter/react-syntax-highlighter@15.5.0...v15.6.1)

---
updated-dependencies:
- dependency-name: react-syntax-highlighter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

site/package.json

@@ -91,7 +91,7 @@
 		"react-markdown": "9.0.1",
 		"react-query": "npm:@tanstack/react-query@4.35.3",
 		"react-router-dom": "6.26.2",
-		"react-syntax-highlighter": "15.5.0",
+		"react-syntax-highlighter": "15.6.1",
 		"react-virtualized-auto-sizer": "1.0.24",
 		"react-window": "1.8.10",
 		"remark-gfm": "4.0.0",