doc tweak to Logging docs

docs/src/logging_workflows.md

@@ -5,8 +5,11 @@
 [MLflow](https://mlflow.org) is a popular, language-agnostic, tool for externally logging
 the outcomes of machine learning experiments, including those carried out using MLJ.
 
-This functionality is provided by the [MLJFlow.jl](https://github.com/JuliaAI/MLJFlow.jl)
-package whose methods are automatically available to MLJ users. Refer to the package's
-documentation for examples.
+MLJ logging examples are given in the [MLJFlow.jl](https://github.com/JuliaAI/MLJFlow.jl)
+documentation. MLJ includes and re-exports all the methods of MLJFlow.jl, so there is no
+need to import MLJFlow.jl if `using MLJ`.
 
+!!! warning
+
+    MLJFlow.jl is a new package still under active development and should be regarded as experimental. At this time, breaking changes to MLJFlow.jl will not necessarily trigger new breaking releases of MLJ.jl.