Bump Microsoft.Graph from 4.49.0 to 5.6.0 (#8)

Bumps [Microsoft.Graph](https://github.com/microsoftgraph/msgraph-sdk-dotnet) from 4.49.0 to 5.6.0.
- [Release notes](https://github.com/microsoftgraph/msgraph-sdk-dotnet/releases)
- [Changelog](https://github.com/microsoftgraph/msgraph-sdk-dotnet/blob/dev/CHANGELOG.md)
- [Commits](microsoftgraph/msgraph-sdk-dotnet@4.49.0...5.6.0)

---
updated-dependencies:
- dependency-name: Microsoft.Graph
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/OneBeyond.Studio.EmailProviders.Graph/OneBeyond.Studio.EmailProviders.Graph.csproj

@@ -17,7 +17,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Graph" Version="5.5.0" />
+    <PackageReference Include="Microsoft.Graph" Version="5.6.0" />
     <PackageReference Include="Azure.Identity" Version="1.8.2" />
   </ItemGroup>