Documentation/rtla: Fix typo in rtla-timerlat.rst

The file says "rtla hist hist mode" instead of "rtla timerlat hist
mode".

Fix the typo.

Fixes: 29380d4 ("rtla: Add rtla timerlat documentation")
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Reviewed-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20250311114936.148012-3-tglozar@redhat.com

Author: lenticularis39

Documentation/tools/rtla/rtla-timerlat.rst

@@ -17,9 +17,9 @@ DESCRIPTION
 .. include:: common_timerlat_description.rst
 
 The **rtla timerlat top** mode displays a summary of the periodic output
-from the *timerlat* tracer. The **rtla hist hist** mode displays a histogram
-of each tracer event occurrence. For further details, please refer to the
-respective man page.
+from the *timerlat* tracer. The **rtla timerlat hist** mode displays
+a histogram of each tracer event occurrence. For further details, please
+refer to the respective man page.
 
 MODES
 =====