Bump @azure/msal-browser from 3.27.0 to 4.7.0 in /app/frontend

Bumps [@azure/msal-browser](https://github.com/AzureAD/microsoft-authentication-library-for-js) from 3.27.0 to 4.7.0.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-js/releases)
- [Commits](AzureAD/microsoft-authentication-library-for-js@msal-browser-v3.27.0...msal-browser-v4.7.0)

---
updated-dependencies:
- dependency-name: "@azure/msal-browser"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

app/frontend/package-lock.json

@@ -12,7 +12,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
-    "@azure/msal-browser": "^3.26.1",
+    "@azure/msal-browser": "^4.7.0",
     "@azure/msal-react": "^2.2.0",
     "@fluentui/react": "^8.112.5",
     "@fluentui/react-components": "^9.56.2",