Bump Microsoft.Graph from 4.48.0 to 4.49.0 in /src (#1677)

Bumps [Microsoft.Graph](https://github.com/microsoftgraph/msgraph-sdk-dotnet) from 4.48.0 to 4.49.0.
- [Release notes](https://github.com/microsoftgraph/msgraph-sdk-dotnet/releases)
- [Commits](microsoftgraph/msgraph-sdk-dotnet@4.48.0...4.49.0)

---
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

@@ -58,7 +58,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.1" />
-    <PackageReference Include="Microsoft.Graph" Version="4.48.0" />
+    <PackageReference Include="Microsoft.Graph" Version="4.49.0" />
     <PackageReference Include="Microsoft.OpenApi" Version="1.4.5" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
     <PackageReference Include="Microsoft.Identity.Web" Version="1.25.10" />