Update modules/ROOT/pages/errors/gql-errors.adoc

Co-authored-by: Louise Berglund <[email protected]>

Author: renetapopova

modules/ROOT/pages/errors/gql-errors.adoc

@@ -563,7 +563,7 @@ Status description:: error: syntax error or access rule violation - unfulfillabl
 
 === 42N78
 
-Status description:: error: syntax error or access rule violation - variable already bound. Node `{ $var }` has already been bound and cannot be modified by the `{ $clause }` clause.
+Status description:: error: syntax error or access rule violation - variable already bound. Node `{ $variable }` has already been bound and cannot be modified by the `{ $clause }` clause.
 
 
 === 42N83