Replace dead docs links with the published GH Pages site

Author: dimitri-yatsenko

README.md

@@ -13,9 +13,7 @@
 
 DataJoint for MATLAB is a high-level programming interface for relational databases designed to support data processing chains in science labs. DataJoint is built on the foundation of the relational data model and prescribes a consistent method for organizing, populating, and querying data.
 
-For more information, see our
-[general DataJoint docs](https://datajoint.com/docs/) and
-[DataJoint MATLAB docs](https://datajoint.com/docs/additional-resources/).
+For MATLAB-specific documentation, see the [DataJoint MATLAB documentation site](https://datajoint.github.io/datajoint-matlab/) (built from `docs/src/` in this repo).
 
 ## For Developers: Running Tests Locally