[DOCS] Use external link in 8.0 breaking change

docs/reference/migration/migrate_8_0/rest-api-changes.asciidoc

@@ -176,8 +176,8 @@ as outlined in the
 {ref}/modules-cross-cluster-search.html#ccs-version-compatibility[compatibility
 matrix].
 
-IMPORTANT: For the <<eql-search-api,EQL search API>>, the local and remote
-clusters must use the same {es} version.
+IMPORTANT: For the {ref}/eql-search-api.html[EQL search API], the local and
+remote clusters must use the same {es} version.
 
 For example, a local 8.0 cluster can search a remote 7.7, 8.0, or
 8.1 cluster. However, a search from a local 8.0 cluster to a remote 7.16 or 6.8