chore: bump xterm from 4.18.0 to 4.19.0 in /site (#2927)

Bumps [xterm](https://github.com/xtermjs/xterm.js) from 4.18.0 to 4.19.0.
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/compare/4.18.0...4.19.0)

---
updated-dependencies:
- dependency-name: xterm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

site/package.json

@@ -53,7 +53,7 @@
     "tzdata": "1.0.30",
     "uuid": "8.3.2",
     "xstate": "4.32.1",
-    "xterm": "4.18.0",
+    "xterm": "4.19.0",
     "xterm-addon-fit": "0.5.0",
     "xterm-addon-web-links": "0.6.0",
     "xterm-addon-webgl": "0.11.4",