Fix missing replace values in ps_thread_stack.

Author: MarkLeith

functions/ps_thread_stack.sql

@@ -77,7 +77,7 @@ BEGIN
               , CONCAT( '"event_info": "'
                   , CASE
                         WHEN event_name NOT LIKE 'wait/io%' THEN REPLACE(SUBSTRING_INDEX(event_name, '/', -2), '\\', '\\\\')
-                        WHEN event_name NOT LIKE 'wait/io/file%' OR event_name NOT LIKE 'wait/io/socket%' THEN REPLACE(SUBSTRING_INDEX(event_name, '/', -4), 
+                        WHEN event_name NOT LIKE 'wait/io/file%' OR event_name NOT LIKE 'wait/io/socket%' THEN REPLACE(SUBSTRING_INDEX(event_name, '/', -4), '\\', '\\\\')
                         ELSE event_name
                     END
                   , '"'