Bump Microsoft.Identity.Client from 4.55.0 to 4.56.0 in /GraphMAUI

Bumps [Microsoft.Identity.Client](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet) from 4.55.0 to 4.56.0.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/releases)
- [Changelog](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/main/CHANGELOG.md)
- [Commits](AzureAD/microsoft-authentication-library-for-dotnet@4.55.0...4.56.0)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

GraphMAUI/GraphMAUI.csproj

@@ -70,7 +70,7 @@
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
         <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="7.0.0" />
         <PackageReference Include="Microsoft.Graph" Version="5.25.0" />
-        <PackageReference Include="Microsoft.Identity.Client" Version="4.55.0" />
+        <PackageReference Include="Microsoft.Identity.Client" Version="4.56.0" />
         <PackageReference Include="Microsoft.Identity.Client.Extensions.Msal" Version="2.32.0" />
         <PackageReference Include="TimeZoneConverter" Version="6.1.0" />
     </ItemGroup>