build: bump @fluentui/react from 8.121.1 to 8.121.4 in /code/frontend (#1409)

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Author: dependabot[bot]

code/frontend/package-lock.json

@@ -11,7 +11,7 @@
     },
     "dependencies": {
         "@babel/traverse": "^7.25.7",
-        "@fluentui/react": "^8.121.1",
+        "@fluentui/react": "^8.121.4",
         "@fluentui/react-icons": "^2.0.259",
         "@fortawesome/fontawesome-svg-core": "^6.6.0",
         "@fortawesome/free-solid-svg-icons": "^6.6.0",