Change classification to beta for TORCH_LOGS (pytorch#118682)

Changes classification of TORCH_LOGS to beta
Pull Request resolved: pytorch#118682
Approved by: https://github.com/svekars

docs/source/logging.rst

@@ -9,7 +9,7 @@ given different log level settings. For instance, one component's log messages
 can be completely disabled, while another component's log messages can be
 set to maximum verbosity.
 
-.. warning:: This feature is a prototype and may have compatibility breaking
+.. warning:: This feature is in beta and may have compatibility breaking
     changes in the future.
 
 .. warning:: This feature has not been expanded to control the log messages of