Bump grommet from 2.39.0 to 2.40.0 in /ps5-mqtt

Bumps [grommet](https://github.com/grommet/grommet) from 2.39.0 to 2.40.0.
- [Release notes](https://github.com/grommet/grommet/releases)
- [Commits](grommet/grommet@v2.39.0...v2.40.0)

---
updated-dependencies:
- dependency-name: grommet
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

ps5-mqtt/client/package.json

@@ -10,7 +10,7 @@
         "@types/react": "^18.2.14",
         "@types/react-dom": "^18.0.11",
         "esbuild": "^0.23.0",
-        "grommet": "^2.39.0",
+        "grommet": "^2.40.0",
         "grommet-icons": "^4.8.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0"