Bump mobx-react from 7.2.1 to 7.3.0 in /website

Bumps [mobx-react](https://github.com/mobxjs/mobx) from 7.2.1 to 7.3.0.
- [Release notes](https://github.com/mobxjs/mobx/releases)
- [Commits](https://github.com/mobxjs/mobx/compare/mobx-react@7.2.1...mobx-react@7.3.0)

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

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

Author: dependabot[bot]

website/package-lock.json

@@ -15,7 +15,7 @@
     "date-fns": "^2.28.0",
     "google-protobuf": "^4.0.0-rc.1",
     "mobx": "^6.4.2",
-    "mobx-react": "^7.2.1",
+    "mobx-react": "^7.3.0",
     "mobx-utils": "^6.0.4",
     "numeral": "^2.0.6",
     "qrcode": "^1.5.0",