Bump Microsoft.Extensions.AI from 9.7.1 to 9.8.0

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.AI
  dependency-version: 9.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

02-SetupDevEnvironment/src/BasicChat-01MEAI/BasicChat-01MEAI.csproj

@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.AI.OpenAI" Version="2.2.0-beta.5" />
-    <PackageReference Include="Microsoft.Extensions.AI" Version="9.7.1" />
+    <PackageReference Include="Microsoft.Extensions.AI" Version="9.8.0" />
     <PackageReference Include="Microsoft.Extensions.AI.AzureAIInference" Version="9.5.0-preview.1.25265.7" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.5.0-preview.1.25265.7" />
   </ItemGroup>