1453-ingress-api/README.md: fix a link

Author: php-coder

keps/sig-network/1453-ingress-api/README.md

@@ -290,7 +290,7 @@ implementation.  The "Design Details" section below is for the real
 nitty-gritty.
 -->
 
-- See [Goals]{#goals) and  [Motivation](#motivation)
+- See [Goals](#goals) and  [Motivation](#motivation)
 
 ### Risks and Mitigations