Bump the dotnet group with 2 updates

Bumps Azure.Identity from 1.15.0 to 1.16.0
Bumps Azure.Identity.Broker from 1.2.1 to 1.3.0

---
updated-dependencies:
- dependency-name: Azure.Identity
  dependency-version: 1.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
- dependency-name: Azure.Identity.Broker
  dependency-version: 1.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/azure/sdk/snippets/authentication/Directory.Packages.props

@@ -8,8 +8,8 @@
     <PackageVersion Include="Microsoft.Extensions.AI" Version="9.3.0-preview.1.25114.11" />
     <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="9.3.0-preview.1.25114.11" />
     <PackageVersion Include="Microsoft.Extensions.Azure" Version="1.12.0" />
-    <PackageVersion Include="Azure.Identity" Version="1.15.0" />
-    <PackageVersion Include="Azure.Identity.Broker" Version="1.2.1" />
+    <PackageVersion Include="Azure.Identity" Version="1.16.0" />
+    <PackageVersion Include="Azure.Identity.Broker" Version="1.3.0" />
     <PackageVersion Include="Azure.Security.KeyVault.Secrets" Version="4.8.0" />
     <PackageVersion Include="Azure.Storage.Blobs" Version="12.25.0" />
     <!-- ASP.NET Core packages -->