psl: update CODEOWNERS to reflect new location
/introspection-engine @prisma/schema-team
-/libs/datamodel @prisma/schema-team
/libs/json-rpc-stdio @prisma/schema-team
-/libs/psl @prisma/schema-team
/libs/sql-ddl @prisma/schema-team
/libs/sql-schema-describer @prisma/schema-team
/libs/test-macros @prisma/schema-team
/migration-engine @prisma/schema-team
/prisma-fmt @prisma/schema-team
+
+/psl @prisma/schema-team
