[yaml] error_handling normalization follow-up

Signed-off-by: Jeffrey Kinard <[email protected]>

sdks/python/apache_beam/yaml/generate_yaml_docs.py

@@ -155,7 +155,7 @@ def normalize_error_handling(f):
                                   param.type_name),
                               param.description) for param in doc.params
                       ]))),
-          description=f.description)
+          description=f.description or doc.short_description)
     return f
 
   def lines():

sdks/python/apache_beam/yaml/yaml_errors.py

@@ -24,7 +24,7 @@
 
 
 class ErrorHandlingConfig(NamedTuple):
-  """Class to define Error Handling parameters.
+  """This option specifies whether and where to output error rows.
 
       Args:
         output (str): Name to use for the output error collection