Bump apollo-server from 2.25.3 to 2.26.1

Bumps [apollo-server](https://github.com/apollographql/apollo-server/tree/HEAD/packages/apollo-server) from 2.25.3 to 2.26.1.
- [Release notes](https://github.com/apollographql/apollo-server/releases)
- [Changelog](https://github.com/apollographql/apollo-server/blob/[email protected]/CHANGELOG.md)
- [Commits](https://github.com/apollographql/apollo-server/commits/[email protected]/packages/apollo-server)

---
updated-dependencies:
- dependency-name: apollo-server
  dependency-type: indirect
...

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