IPv6: Fix 6RD typo

Following fix a small typo.
Signed-off-by: NAlexandre Cassen <acassen@freebox.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/Kconfig

@@ -171,7 +171,7 @@ config IPV6_SIT
 	  Saying M here will produce a module called sit. If unsure, say Y.
 
 config IPV6_SIT_6RD
-	bool "IPv6: IPv6 Rapid Development (6RD) (EXPERIMENTAL)"
+	bool "IPv6: IPv6 Rapid Deployment (6RD) (EXPERIMENTAL)"
 	depends on IPV6_SIT && EXPERIMENTAL
 	default n
 	---help---