Update docs-parts/queries/11-Universal-Sets_lang1.rst

Co-Authored-By: austin-hilberg <[email protected]>

Author: dimitri-yatsenko

docs-parts/queries/11-Universal-Sets_lang1.rst

@@ -15,4 +15,4 @@
   U('home_state').aggr(university.Student, 'count(*)->n')
 
   % Total number of students in the database
-  U().aggr(university.Student, 'count(*)->n')
+aggr(U(), university.Student, 'count(*)->n')