apply review comments

Author: Hendrik Muhs

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/transform/TransformDeprecations.java

@@ -11,11 +11,9 @@ public class TransformDeprecations {
     public static final String BREAKING_CHANGES_BASE_URL =
         "https://www.elastic.co/guide/en/elasticsearch/reference/master/migrating-8.0.html";
 
-    public static final String QUERY_BREAKING_CHANGES_URL =
-        "https://www.elastic.co/guide/en/elasticsearch/reference/master/migrating-8.0.html#breaking_80_search_changes";
+    public static final String QUERY_BREAKING_CHANGES_URL = BREAKING_CHANGES_BASE_URL + "#breaking_80_search_changes";
 
-    public static final String AGGS_BREAKING_CHANGES_URL =
-        "https://www.elastic.co/guide/en/elasticsearch/reference/master/migrating-8.0.html#breaking_80_aggregations_changes";
+    public static final String AGGS_BREAKING_CHANGES_URL = BREAKING_CHANGES_BASE_URL + "#breaking_80_aggregations_changes";
 
     private TransformDeprecations() {}
 }