doc.go: remove second place from descriptor table

doc.go

@@ -92,11 +92,11 @@ You may use one of several pre-defined schedules in place of a cron expression.
 
 	Entry                  | Description                                | Equivalent To
 	-----                  | -----------                                | -------------
-	@yearly (or @annually) | Run once a year, midnight, Jan. 1st        | 0 0 0 1 1 *
-	@monthly               | Run once a month, midnight, first of month | 0 0 0 1 * *
-	@weekly                | Run once a week, midnight between Sat/Sun  | 0 0 0 * * 0
-	@daily (or @midnight)  | Run once a day, midnight                   | 0 0 0 * * *
-	@hourly                | Run once an hour, beginning of hour        | 0 0 * * * *
+	@yearly (or @annually) | Run once a year, midnight, Jan. 1st        | 0 0 1 1 *
+	@monthly               | Run once a month, midnight, first of month | 0 0 1 * *
+	@weekly                | Run once a week, midnight between Sat/Sun  | 0 0 * * 0
+	@daily (or @midnight)  | Run once a day, midnight                   | 0 0 * * *
+	@hourly                | Run once an hour, beginning of hour        | 0 * * * *
 
 Intervals