Fix function comment

Signed-off-by: falkTX <falktx@falktx.com>

common/jack/jack.h

@@ -705,10 +705,10 @@ int jack_engine_takeover_timebase (jack_client_t *) JACK_OPTIONAL_WEAK_DEPRECATE
 float jack_cpu_load (jack_client_t *client) JACK_OPTIONAL_WEAK_EXPORT;
 
 /**
- * @return the current maximum CPU load used by JACK.  This is a running
- * average of the time it takes to execute a full process cycle for
- * all clients as a percentage of the real time available per cycle
- * determined by the buffer size and sample rate.
+ * @return the current maximum CPU load used by JACK.  This is the
+ * total time it takes to execute a full process cycle for all clients
+ * as a percentage of the real time available per cycle determined
+ * by the buffer size and sample rate.
  */
 float jack_max_cpu_load (jack_client_t *client) JACK_OPTIONAL_WEAK_EXPORT;