Create readme.md for Sydney Meetup

Added read me for Sydney Meetup

meetup126/readme.md

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+This event was held on 05 September, 2024 in Sydney at Rokt.
+
+https://www.meetup.com/clickhouse-australia-user-group/events/302862966/
+
+**Agenda:**
+- 5:00 PM: Registration, drinks & networking
+- 6:00 PM: Welcome and Introductions
+- 6:10 PM: What’s new with ClickHouse: Updates, Integrations & Acquisitions by Johnny Mirza, Solution Architect @ ClickHouse
+- 6:30 PM: Our Journey to Ingest and Analyse 5 Billion Network Events / Day by Sharat Madanapalli, Head of Data & AI @ Canopus
+- 6:50 PM: Talk track 3 (CipherStash)
+- 7:10 PM: Q&A, networking, light dinner, and more drinks
+- 8:30 PM: Wrap-up