Manual.rst: Update fullCalendar example - dayOfWeeks is named 'dow' in V3

Documentation/Manual.rst

@@ -7852,7 +7852,7 @@ Example::
                        "defaultView": "agendaWeek",
                        "minTime": "05:00:00",
                        "maxTime": "20:00:00",
-                       "businessHours": { "daysOfWeek": [ 1, 2, 3, 4 ], "startTime": "10:00", "endTime": "18:00" },
+                       "businessHours": { "dow": [ 1, 2, 3, 4 ], "startTime": "10:00", "endTime": "18:00" },
                        "events": [
                          { "id": "a", "title": "my event","start": "2020-01-21"},
                          { "id": "b", "title": "my other event", "start": "2020-01-16T09:00:00", "end": "2020-01-16T11:30:00"}
@@ -7878,7 +7878,7 @@ Example::
                        "dayCount": 3,
                        "minTime": "08:00:00",
                        "maxTime": "18:00:00",
-                       "businessHours": { "daysOfWeek": [ 1, 2, 3, 4 ], "startTime": "10:00", "endTime": "18:00" },
+                       "businessHours": { "dow": [ 1, 2, 3, 4 ], "startTime": "10:00", "endTime": "18:00" },
                        "events": [
                          { "id": "a","title": "my event","start": "2020-01-15T10:15:00", "end": "2020-01-15T11:50:00", "color": "#25adf1", "textColor": "#000"},
                          { "id": "b", "title": "my other event", "start": "2020-01-16T09:00:00", "end": "2020-01-16T11:30:00", "color": "#5cb85c", "textColor": "#000"},