Fixing copy/paste typo

Author: BrentOzar

sp_BlitzWho.sql

@@ -1048,7 +1048,7 @@ SET @StringToExecute +=
 								WHEN @SortOrder = 'request_physical_reads'		THEN 'COALESCE(r.reads, s.reads) DESC '
 								WHEN @SortOrder = 'session_cpu'		THEN 's.cpu_time DESC'
 								WHEN @SortOrder = 'session_logical_reads'		THEN 's.logical_reads DESC'
-								WHEN @SortOrder = 'session_physical_reads'		THEN 's.writes DESC'
+								WHEN @SortOrder = 'session_physical_reads'		THEN 's.reads DESC'
 								WHEN @SortOrder = 'session_writes'		THEN 's.writes DESC'
 								WHEN @SortOrder = 'tempdb_allocations_mb'		THEN '[tempdb_allocations_mb] DESC'
 								WHEN @SortOrder = 'memory_usage'		THEN '[memory_usage] DESC'