rtla: Fix systme -> system typo on man page

Link: https://lkml.kernel.org/r/[email protected]

Fixes: 496082d ("rtla: Add rtla osnoise man page")
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Acked-by: Daniel Bristot de Oliveira <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: acmel

Documentation/tools/rtla/common_osnoise_description.rst

@@ -1,7 +1,7 @@
 The **rtla osnoise** tool is an interface for the *osnoise* tracer. The
 *osnoise* tracer dispatches a kernel thread per-cpu. These threads read the
 time in a loop while with preemption, softirq and IRQs enabled, thus
-allowing all the sources of operating systme noise during its execution.
+allowing all the sources of operating system noise during its execution.
 The *osnoise*'s tracer threads take note of the delta between each time
 read, along with an interference counter of all sources of interference.
 At the end of each period, the *osnoise* tracer displays a summary of