add Data Umbrella: Polars event (#694)

Author: reshamas

.DS_Store

@@ -0,0 +1,13 @@
+name: Data Umbrella Events Calendar
+events:
+  - summary: Polars & Narwhals - Understanding Expressions When You're Used to pandas
+    description: |
+      A fortnightly meeting to share updates on everything
+      that is happening in the NumPy community. Everyone is welcome
+      to attend and contribute to a conversation.
+
+      Meetup: https://www.meetup.com/data-umbrella/events/304005848/
+      Webinarlink: https://www.bigmarker.com/neo4j/Data-Umbrella-Webinar
+    begin: 2024-11-19 17:00:00 +00:00
+    end: 2024-11-19 18:00:00 +00:00
+    url: https://www.bigmarker.com/neo4j/Data-Umbrella-Webinar