CODEOWNERS: add correct active user aggregates sql generation prefix (#5821)

Co-authored-by: Lucia <30448600+lucia-vargas-a@users.noreply.github.com>

CODEOWNERS

@@ -1,7 +1,7 @@
 # These datasets are subject to the additional change control procedures
 # described in https://docs.google.com/document/d/1TTJi4ht7NuzX6BPG_KTr6omaZg70cEpxe9xlpfnHj9k/
 # Active Users
-/sql_generators/active_users/templates/ @mozilla/kpi_table_reviewers
+/sql_generators/active_users_aggregates_v3/templates/ @mozilla/kpi_table_reviewers
 /sql/moz-fx-data-shared-prod/fenix_derived/active_users_aggregates_v3/ @mozilla/kpi_table_reviewers
 /sql/moz-fx-data-shared-prod/firefox_desktop_derived/active_users_aggregates_v1/ @mozilla/kpi_table_reviewers
 /sql/moz-fx-data-shared-prod/firefox_ios_derived/active_users_aggregates_v3/ @mozilla/kpi_table_reviewers