Bump Azure.Identity from 1.8.2 to 1.9.0 in /GraphSampleFunctions

Bumps [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Identity_1.8.2...Azure.Identity_1.9.0)

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

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

GraphSampleFunctions/GraphSampleFunctions.csproj

@@ -8,7 +8,7 @@
     <UserSecretsId>08b88a61-2524-42f0-94ef-b578337333ec</UserSecretsId>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Azure.Identity" Version="1.8.2" />
+    <PackageReference Include="Azure.Identity" Version="1.9.0" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.0.13" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.10.0" OutputItemType="Analyzer" />
     <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.14.1" />