lib: dimlib: fix help text typos

Fix help text typos for DIMLIB.

Fixes: 4f75da36 ("linux/dim: Move implementation to .c files")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Uwe Kleine-König <uwe@kleine-koenig.org>
Cc: Tal Gilboa <talgi@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

lib/Kconfig

@@ -558,7 +558,7 @@ config DIMLIB
 	bool
 	help
 	  Dynamic Interrupt Moderation library.
-	  Implements an algorithm for dynamically change CQ modertion values
+	  Implements an algorithm for dynamically changing CQ moderation values
 	  according to run time performance.
 
 #