[readme] sanity check

README.md

@@ -5,7 +5,9 @@ with ROS.
 
 ## Documentation
 
-Quickstart with [![docs][py-trees-ros-tutorials-docs-eloquent-image]][py-trees-ros-tutorials-docs-2.0.x], using [![docs][py-trees-docs-eloquent-image]][py-trees-docs-2.0.x] as a reference and basic primer on behaviour trees.
+Get started with the [PyTree ROS2 tutorials](https://py-trees-ros-tutorials.readthedocs.io/en/release-2.0.x/), using the [PyTree Documentation](https://py-trees.readthedocs.io/en/release-2.0.x/) as a reference and basic primer on behaviour trees. 
+
+Distro-specific links:
 
 * Basics & Core Module API: [![docs][py-trees-docs-eloquent-image]][py-trees-docs-2.0.x] [![docs][py-trees-docs-dashing-image]][py-trees-docs-1.3.x]
 * ROS2 Module API: [![docs][py-trees-ros-docs-eloquent-image]][py-trees-ros-docs-2.0.x] [![docs][py-trees-ros-docs-dashing-image]][py-trees-ros-docs-1.2.x]