Bump next-auth from 5.0.0-beta.27 to 5.0.0-beta.28

Bumps [next-auth](https://github.com/nextauthjs/next-auth) from 5.0.0-beta.27 to 5.0.0-beta.28.
- [Release notes](https://github.com/nextauthjs/next-auth/releases)
- [Commits](https://github.com/nextauthjs/next-auth/compare/[email protected]@5.0.0-beta.28)

---
updated-dependencies:
- dependency-name: next-auth
  dependency-version: 5.0.0-beta.28
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -66,7 +66,7 @@
     "isomorphic-dompurify": "^2.24.0",
     "jwt-decode": "^4.0.0",
     "next": "15.3.3",
-    "next-auth": "^5.0.0-beta.27",
+    "next-auth": "^5.0.0-beta.28",
     "nhsuk-react-components": "^5.0.0",
     "openid-client": "^6.4.2",
     "pino": "^9.6.0",