build(deps): bump Microsoft.KernelMemory.Core, System.Text.Json and Microsoft.KernelMemory.Abstractions (#546)

Bumps [Microsoft.KernelMemory.Core](https://github.com/microsoft/kernel-memory), [System.Text.Json](https://github.com/dotnet/runtime) and [Microsoft.KernelMemory.Abstractions](https://github.com/microsoft/kernel-memory). These dependencies needed to be updated together.

Updates `Microsoft.KernelMemory.Core` from 0.26.240121.1 to 0.29.240219.2
- [Release notes](https://github.com/microsoft/kernel-memory/releases)
- [Commits](https://github.com/microsoft/kernel-memory/compare/packages-0.26.240121.1...packages-0.29.240219.2)

Updates `System.Text.Json` from 8.0.1 to 8.0.2
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/compare/v8.0.1...v8.0.2)

Updates `Microsoft.KernelMemory.Abstractions` from 0.26.240104.1 to 0.29.240219.3
- [Release notes](https://github.com/microsoft/kernel-memory/releases)
- [Commits](https://github.com/microsoft/kernel-memory/compare/0.26.240104.1...abstractions-0.29.240219.3)

---
updated-dependencies:
- dependency-name: Microsoft.KernelMemory.Core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.KernelMemory.Abstractions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

LLama.Examples/LLama.Examples.csproj

@@ -15,7 +15,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
-    <PackageReference Include="Microsoft.KernelMemory.Core" Version="0.26.240121.1" />
+    <PackageReference Include="Microsoft.KernelMemory.Core" Version="0.29.240219.2" />
     <PackageReference Include="Microsoft.SemanticKernel" Version="1.1.0" />
     <PackageReference Include="Microsoft.SemanticKernel.Plugins.Memory" Version="1.1.0-alpha" />
     <PackageReference Include="Spectre.Console" Version="0.48.0" />