Bump Azure.Core (#42079)

Bumps the dotnet group in /docs/ai/how-to/snippets/content-filtering with 1 update: [Azure.Core](https://github.com/Azure/azure-sdk-for-net).


Updates `Azure.Core` from 1.41.0 to 1.42.0
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Core_1.41.0...Azure.Core_1.42.0)

---
updated-dependencies:
- dependency-name: Azure.Core
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/ai/how-to/snippets/content-filtering/AIContentFiltering.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.AI.OpenAI" Version="1.0.0-beta.17" />
-    <PackageReference Include="Azure.Core" Version="1.41.0" />
+    <PackageReference Include="Azure.Core" Version="1.42.0" />
   </ItemGroup>
 
 </Project>