Move September Workshop

Move the Python workshop in September so Fredo can go on vacation as well.

_events/2021/09/2021-09-17-python.md

@@ -7,16 +7,18 @@ lecturers:
   - TBA
 type:   workshop
 start:
-    date:   "2021-09-17"
+    date:   "2021-09-24"
+    time:   "09:00"
 end:
-    date:   "2021-09-20"
+    date:   "2021-09-24"
+    time:   "17:00"
 registration_link:
 location:
     campus: Online
 fully_booked_out: false
 registration_period:
-    from:   "2021-09-06"
-    to:     "2021-09-12"
+    from:   "2021-09-13"
+    to:     "2021-09-19"
 excerpt:
     "An Introduction for scientists and PhD. students to programming using the
      language Python. No prior experience required."