Bump Microsoft.Graph from 4.47.0 to 4.48.0 in /src (#1590)

Bumps [Microsoft.Graph](https://github.com/microsoftgraph/msgraph-sdk-dotnet) from 4.47.0 to 4.48.0.
- [Release notes](https://github.com/microsoftgraph/msgraph-sdk-dotnet/releases)
- [Commits](microsoftgraph/msgraph-sdk-dotnet@4.47.0...4.48.0)

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

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src/AzureIoTHub.Portal.Server/AzureIoTHub.Portal.Server.csproj

@@ -42,7 +42,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="6.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.9" />
     <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Graph" Version="4.47.0" />
+    <PackageReference Include="Microsoft.Graph" Version="4.48.0" />
     <PackageReference Include="Microsoft.OpenApi" Version="1.4.3" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
     <PackageReference Include="Microsoft.Identity.Web" Version="1.25.5" />