Bump Microsoft.ML

Bumps the dotnet group in /docs/machine-learning/how-to-guides/snippets/load-data-ml-net with 1 update: [Microsoft.ML](https://github.com/dotnet/machinelearning).


Updates `Microsoft.ML` from 3.0.1 to 4.0.0
- [Release notes](https://github.com/dotnet/machinelearning/releases)
- [Commits](https://github.com/dotnet/machinelearning/commits)

---
updated-dependencies:
- dependency-name: Microsoft.ML
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/machine-learning/how-to-guides/snippets/load-data-ml-net/Project.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ML" Version="3.0.1" />
+    <PackageReference Include="Microsoft.ML" Version="4.0.0" />
   </ItemGroup>
 
 </Project>