Bump @graphql-tools/github-loader from 7.3.19 to 7.3.20

Bumps [@graphql-tools/github-loader](https://github.com/ardatan/graphql-tools/tree/HEAD/packages/loaders/github) from 7.3.19 to 7.3.20.
- [Release notes](https://github.com/ardatan/graphql-tools/releases)
- [Changelog](https://github.com/ardatan/graphql-tools/blob/master/packages/loaders/github/CHANGELOG.md)
- [Commits](https://github.com/ardatan/graphql-tools/commits/@graphql-tools/[email protected]/packages/loaders/github)

---
updated-dependencies:
- dependency-name: "@graphql-tools/github-loader"
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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