bootcount: Update to point to current documentation

The current documentation for the bootcount API is on our website and
not the old wiki, update the link in two places.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig
index 2105cea..d375984 100644
--- a/drivers/bootcount/Kconfig
+++ b/drivers/bootcount/Kconfig
@@ -6,7 +6,7 @@
 	bool "Enable support for checking boot count limit"
 	help
 	  Enable checking for exceeding the boot count limit.
-	  More information: http://www.denx.de/wiki/DULG/UBootBootCountLimit
+	  More information: https://docs.u-boot.org/en/latest/api/bootcount.html
 
 if BOOTCOUNT_LIMIT