fixed watch.py, openapi generator v6.6.0 used :rtype: in place of :return:

Author: yliaog

kubernetes/base/watch/watch.py

@@ -18,7 +18,7 @@
 
 from kubernetes import client
 
-PYDOC_RETURN_LABEL = ":return:"
+PYDOC_RETURN_LABEL = ":rtype:"
 PYDOC_FOLLOW_PARAM = ":param bool follow:"
 
 # Removing this suffix from return type name should give us event's object