Bump Microsoft.Agents.AI.GitHub.Copilot from 1.0.0-preview.260311.1 to 1.0.0-preview.260402.1

---
updated-dependencies:
- dependency-name: Microsoft.Agents.AI.GitHub.Copilot
  dependency-version: 1.0.0-preview.260402.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -22,7 +22,7 @@
     <PackageVersion Include="Microsoft.ML.OnnxRuntimeGenAI" Version="0.12.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageVersion Include="Microsoft.Agents.AI" Version="1.0.0-rc4" />
-    <PackageVersion Include="Microsoft.Agents.AI.GitHub.Copilot" Version="1.0.0-preview.260311.1" />
+    <PackageVersion Include="Microsoft.Agents.AI.GitHub.Copilot" Version="1.0.0-preview.260402.1" />
     <PackageVersion Include="Microsoft.Agents.AI.Workflows" Version="1.0.0-rc4" />
     <PackageVersion Include="Microsoft.Orleans.Server" Version="10.0.1" />
     <PackageVersion Include="NUnit" Version="4.5.1" />