skimage calendar: add back missing time 🤦‍ (#840)

* Add back missing time 🤦‍

* Making datetime happy

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Co-authored-by: Brigitta Sipőcz <b.sipocz@gmail.com>

Author: stefanv

calendars/skimage.yaml

@@ -34,7 +34,7 @@ events:
 
       Meeting notes: https://hackmd.io/_lEfDqKRRNCYSXSS4s9uRg
       Archive: https://github.com/scikit-image/skimage-archive/tree/main/meeting-notes
-    begin: 2026-01-13
+    begin: 2026-01-13 12:00:00
     duration: { minutes: 60 }
     url: https://numfocus-org.zoom.us/j/86509289147?pwd=AXgP0r2sPYdekAyvenjbuztFbFwHvm.1
     repeat: