fix incorrect tags

Author: JPryce-Aklundh

modules/ROOT/pages/schema/constraints/create-constraints.adoc

@@ -551,9 +551,9 @@ Added 1 constraint.
 ======
 
 .Create a constraint requiring `KNOWS` relationships to have a unique combination of `since` and `how` properties as a relationship key
+// tag::schema_constraints_composite_key[]
 [source, cypher]
 ----
-// tag::schema_constraints_composite_key[]
 CREATE CONSTRAINT knows_since_how
 FOR ()-[knows:KNOWS]-() REQUIRE (knows.since, knows.how) IS RELATIONSHIP KEY
 ----

modules/ROOT/pages/schema/constraints/drop-constraints.adoc

@@ -64,7 +64,7 @@ FOR ()-[wrote:WROTE]-() REQUIRE wrote.published IS NOT NULL
 ----
 DROP CONSTRAINT book_isbn
 ----
-// tag::schema_constraints_drop[]
+// end::schema_constraints_drop[]
 
 .Result
 [source, queryresult]