Bump Microsoft.Extensions.AI from 10.2.0 to 10.3.0

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.AI
  dependency-version: 10.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Part 6 - Deployment/GenAiLab/GenAiLab.Web/GenAiLab.Web.csproj

@@ -11,7 +11,7 @@
     <PackageReference Include="Azure.AI.OpenAI" Version="2.3.0-beta.2" />
     <PackageReference Include="Aspire.Azure.AI.OpenAI" Version="9.5.0-preview.1.25474.7" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.9.1-preview.1.25474.6" />
-    <PackageReference Include="Microsoft.Extensions.AI" Version="10.2.0" />
+    <PackageReference Include="Microsoft.Extensions.AI" Version="10.3.0" />
     <PackageReference Include="Microsoft.SemanticKernel.Core" Version="1.70.0" />
     <PackageReference Include="PdfPig" Version="0.1.11" />
     <PackageReference Include="Aspire.Qdrant.Client" Version="13.1.0" />