build(deps): bump Azure.Identity in /src/GraphWebhooks

Bumps [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.13.1 to 1.13.2.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Identity_1.13.1...Azure.Identity_1.13.2)

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

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

src/GraphWebhooks/GraphWebhooks.csproj

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Identity" Version="1.13.1" />
+    <PackageReference Include="Azure.Identity" Version="1.13.2" />
     <PackageReference Include="Azure.Security.KeyVault.Certificates" Version="4.7.0" />
     <PackageReference Include="Azure.Security.KeyVault.Secrets" Version="4.7.0" />
     <PackageReference Include="Microsoft.Identity.Web" Version="3.4.0" />