Bump parcel from 2.15.2 to 2.15.4 in /demos/moderator (#1515)

Bumps [parcel](https://github.com/parcel-bundler/parcel) from 2.15.2 to 2.15.4.
- [Release notes](https://github.com/parcel-bundler/parcel/releases)
- [Changelog](https://github.com/parcel-bundler/parcel/blob/v2/CHANGELOG.md)
- [Commits](https://github.com/parcel-bundler/parcel/commits)

---
updated-dependencies:
- dependency-name: parcel
  dependency-version: 2.15.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

demos/moderator/package.json

@@ -19,7 +19,7 @@
   "dependencies": {
     "npm": "^11.4.2",
     "package.json": "^2.0.1",
-    "parcel": "^2.15.2",
+    "parcel": "^2.15.4",
     "preact": "10.26.9",
     "snyk": "^1.1297.2",
     "whatwg-fetch": "3.6.20",