[new-owner-report.scm] fix display/due-date tooltip

gnucash/report/reports/standard/new-owner-report.scm

@@ -891,7 +891,7 @@ and do not match the transaction."))))))))
 
   (gnc-register-simple-boolean-option options
     (N_ "Display Columns") due-date-header
-    "c" (N_ "Display the transaction date?") #t)
+    "c" (N_ "Display the invoice due date?") #t)
 
   (gnc-register-simple-boolean-option options
     (N_ "Display Columns") reference-header