Bump Microsoft.ML from 3.0.1 to 4.0.1 in /docs/machine-learning/how-to-guides/snippets/load-data-ml-net in the dotnet group across 1 directory

Bump Microsoft.ML from 3.0.1 to 4.0.1 in /docs/machine-learning/how-to-guides/snippets/load-data-ml-net in the dotnet group across 1 directory #823