host-code-update: Fix link

https://github.com/openbmc/docs/commit/8f30b30be4d145b30bda3f31c71ae8c3867b5e1a
renamed ubi-code-update.md to code-update.md breaking this
link.

Change-Id: I2bcbeff32c625955e1eab92ad98a8fbb8b9cddf0
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/code-update/host-code-update.md b/code-update/host-code-update.md
index 3f6d267..f9b98a0 100644
--- a/code-update/host-code-update.md
+++ b/code-update/host-code-update.md
@@ -130,7 +130,7 @@
 
 Information about associations, the MANIFEST file, deleting an image, software
 field mode, and software factory reset can be found at
-[ubi-code-update.md#associations](ubi-code-update.md#associations)
+[code-update.md#associations](code-update.md#associations)
 
 ### Implementation