Fixed typo in README (pointed out by Martin Jost).

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/README b/README
index 2994c4c..852ad72 100644
--- a/README
+++ b/README
@@ -1116,7 +1116,7 @@
 		boot, thus flooding the BOOTP server. Defining
 		CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be
 		inserted before sending out BOOTP requests. The
-		following delays are insterted then:
+		following delays are inserted then:
 
 		1st BOOTP request:	delay 0 ... 1 sec
 		2nd BOOTP request:	delay 0 ... 2 sec