chore(website): update dependency @bugsnag/js to v8.4.0 (#7502)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: renovate[bot]

site/package-lock.json

@@ -17,7 +17,7 @@
   "license": "MIT",
   "dependencies": {
     "@astrojs/starlight": "0.35.2",
-    "@bugsnag/js": "8.2.0",
+    "@bugsnag/js": "8.4.0",
     "astro": "5.12.5",
     "markdown-magic": "2.6.1",
     "sharp": "0.34.3",