chore(deps-dev): bump prettier from 2.2.1 to 2.3.0 in /microsite

Bumps [prettier](https://github.com/prettier/prettier) from 2.2.1 to 2.3.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.2.1...2.3.0)

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

microsite/package.json

@@ -18,7 +18,7 @@
     "@spotify/prettier-config": "^10.0.0",
     "docusaurus": "^2.0.0-alpha.70",
     "js-yaml": "^4.1.0",
-    "prettier": "^2.2.1"
+    "prettier": "^2.3.0"
   },
   "prettier": "@spotify/prettier-config"
 }