Bump flatted from 3.2.7 to 3.4.2 in /site

Bumps [flatted](https://github.com/WebReflection/flatted) from 3.2.7 to 3.4.2.
- [Commits](WebReflection/flatted@v3.2.7...v3.4.2)

---
updated-dependencies:
- dependency-name: flatted
  dependency-version: 3.4.2
  dependency-type: indirect
...

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

Author: dependabot[bot]

site/package-lock.json

@@ -1173,9 +1173,9 @@ flat-cache@^3.0.4:
     rimraf "^3.0.2"
 
 flatted@^3.1.0:
-  version "3.2.7"
-  resolved "https://registry.npmjs.org/flatted/-/flatted-3.2.7.tgz"
-  integrity sha512-5nqDSxl8nn5BSNxyR3n4I6eDmbolI6WT+QqR547RwxQapgjQBmtktdP+HTBb/a/zLsbzERTONyUB5pefh5TtjQ==
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.4.2.tgz#f5c23c107f0f37de8dbdf24f13722b3b98d52726"
+  integrity sha512-PjDse7RzhcPkIJwy5t7KPWQSZ9cAbzQXcafsetQoD7sOJRQlGikNbx7yZp2OotDnJyrDcbyRq3Ttb18iYOqkxA==
 
 fraction.js@^4.2.0:
   version "4.2.0"