docs: fix broken schema link (open-policy-agent#6617)

This link should point to #annotations on the same page.

Signed-off-by: Charlie Egan <charlie@styra.com>
Signed-off-by: Thomas Sidebottom <thomas.sidebottom@va.gov>

docs/content/policy-language.md

@@ -2877,7 +2877,7 @@ allow if {
 ### Schemas
 
 The `schemas` annotation is a list of key value pairs, associating schemas to data values.
-In-depth information on this topic can be found [here](../schemas#schema-annotations).
+In-depth information on this topic can be found [here](#annotations).
 
 #### Schema Reference Format