chore(deps): bump @apollo/server in /examples/federation-v2-e2e/gateway

Bumps [@apollo/server](https://github.com/apollographql/apollo-server/tree/HEAD/packages/server) from 5.2.0 to 5.4.0.
- [Release notes](https://github.com/apollographql/apollo-server/releases)
- [Changelog](https://github.com/apollographql/apollo-server/blob/main/packages/server/CHANGELOG.md)
- [Commits](https://github.com/apollographql/apollo-server/commits/@apollo/server@5.4.0/packages/server)

---
updated-dependencies:
- dependency-name: "@apollo/server"
  dependency-version: 5.4.0
  dependency-type: direct:production
...

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Author: dependabot[bot]