lib: ratelimit: fix spelling mistake 'seperately'

Corrects a spelling mistake in a comment in ratelimit.c where 'seperately'
was used instead of 'separately'.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Chia-Liang Wang <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

lib/ratelimit.c

···
 int ___ratelimit(struct ratelimit_state *rs, const char *func)
 {
 	/* Paired with WRITE_ONCE() in .proc_handler().
-	 * Changing two values seperately could be inconsistent
+	 * Changing two values separately could be inconsistent
 	 * and some message could be lost.  (See: net_ratelimit_state).
 	 */
 	int interval = READ_ONCE(rs->interval);