Kconfig.debug: fix the help description in SCHED_DEBUG

The correct file path for SCHED_DEBUG is /sys/kernel/debug/sched.

Link: https://lkml.kernel.org/r/202301291013573466558@zte.com.cn
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/Kconfig.debug

@@ -1208,7 +1208,7 @@ config SCHED_DEBUG
 	depends on DEBUG_KERNEL && PROC_FS
 	default y
 	help
-	  If you say Y here, the /proc/sched_debug file will be provided
+	  If you say Y here, the /sys/kernel/debug/sched file will be provided
 	  that can help debug the scheduler. The runtime overhead of this
 	  option is minimal.