point to stable doc

Author: jburel

README.rst

@@ -1,8 +1,8 @@
 .. image:: https://github.com/ome/omero-scripts/workflows/OMERO/badge.svg
     :target: https://github.com/ome/omero-scripts/actions
 
-.. image:: https://readthedocs.org/projects/omero-scripts/badge/?version=latest
-    :target: https://readthedocs.org/projects/omero-scripts/badge/?version=latest
+.. image:: https://readthedocs.org/projects/omero-scripts/badge/?version=stable
+    :target: https://readthedocs.org/projects/omero-scripts/badge/?version=stable
 
 .. image:: https://badge.fury.io/py/omero-scripts.svg
     :target: https://badge.fury.io/py/omero-scripts