Bump undici and @graphql-tools/url-loader

Removes [undici](https://github.com/nodejs/undici). It's no longer used after updating ancestor dependency [@graphql-tools/url-loader](https://github.com/ardatan/graphql-tools/tree/HEAD/packages/loaders/url). These dependencies need to be updated together.


Removes `undici`

Updates `@graphql-tools/url-loader` from 7.16.4 to 7.17.18
- [Release notes](https://github.com/ardatan/graphql-tools/releases)
- [Changelog](https://github.com/ardatan/graphql-tools/blob/master/packages/loaders/url/CHANGELOG.md)
- [Commits](https://github.com/ardatan/graphql-tools/commits/@graphql-tools/url-loader@7.17.18/packages/loaders/url)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 
  dependency-type: indirect
- dependency-name: "@graphql-tools/url-loader"
  dependency-version: 7.17.18
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]