Bump @microsoft/microsoft-graph-types from 2.19.0 to 2.20.0 (#787)

Bumps [@microsoft/microsoft-graph-types](https://github.com/microsoftgraph/msgraph-typescript-typings) from 2.19.0 to 2.20.0.
- [Release notes](https://github.com/microsoftgraph/msgraph-typescript-typings/releases)
- [Commits](microsoftgraph/msgraph-typescript-typings@2.19.0...2.20.0)

---
updated-dependencies:
- dependency-name: "@microsoft/microsoft-graph-types"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]