workqueue: Fix cpu_intensive_thresh_us name in help text

There exists no parameter called "cpu_intensive_threshold_us".
The actual parameter name is "cpu_intensive_thresh_us".

Fixes: 63638450 ("workqueue: Report work funcs that trigger automatic CPU_INTENSIVE mechanism")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

lib/Kconfig.debug

@@ -1200,7 +1200,7 @@ config WQ_CPU_INTENSIVE_REPORT
 	help
 	  Say Y here to enable reporting of concurrency-managed per-cpu work
 	  items that hog CPUs for longer than
-	  workqueue.cpu_intensive_threshold_us. Workqueue automatically
+	  workqueue.cpu_intensive_thresh_us. Workqueue automatically
 	  detects and excludes them from concurrency management to prevent
 	  them from stalling other per-cpu work items. Occassional
 	  triggering may not necessarily indicate a problem. Repeated