Moved monthly meeting to first week of the month (#343)

* Moved monthly meeting to first week of the month

* change to rrule

* add new line

* Remove spaces on empty line

* Fix ics RRULE

* fix day of the week

Co-authored-by: Noa Tamir <“6564007+noatamir@users.noreply.github.com”>
Co-authored-by: Pamphile Roy <roy.pamphile@gmail.com>

Author: 3 people

calendars/matplotlib.yaml

@@ -18,19 +18,15 @@ events:
         days: 7
       until: 2025-01-01 00:00:00
 
-  - summary: Matplotlib Monthly New Contributor Meeting
+  - summary: Matplotlib Monthly New Contributors Meeting
     description: |
       The monthly call for new contributors to the Matplotlib project 🎉
 
       All are welcome.
 
       Meeting notes: https://hackmd.io/@matplotlib
 
-    begin: 2022-09-06 19:00:00
-    end: 2022-09-06 20:00:00
+    begin: 2022-12-06 19:00:00
+    end: 2022-12-06 20:00:00
     url: https://us06web.zoom.us/j/81285851006?pwd=Tks2QjRkNWh5NGw0TmU1RUwwOVluZz09
-    repeat:
-      interval:
-        # seconds, minutes, hours, days, weeks, months, years
-        days: 28
-      until: 2025-01-01 00:00:00
+    ics: RRULE:FREQ=MONTHLY;BYDAY=1TU