docs: update readme (#754)

minor fix to the readme file

Author: lorenzo-cavazzi

README.rst

@@ -194,7 +194,7 @@ Finally, run ``renku`` via the debugger:
 
 ::
 
-    $ ~/.local/pipx/venvs/renku/bin/python -m ptvsd --host localhost --wait -m renku <command>
+    $ ~/.local/pipx/venvs/renku/bin/python -m ptvsd --host localhost --wait -m renku.cli <command>
 
 
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