Update organizational_membership.md - update information about conferences

Author: sandragesing

pages/get_involved/organizational_membership.md

@@ -42,9 +42,9 @@ US-RSE offers a variety of services to its individual and organizational members
 Examples include:
 
 - Our annual conference
-  - The [2023 inaugural conference](https://us-rse.org/usrse23/) was a
-    resounding success, selling out with 250 attendees.
-  - For [2024](https://us-rse.org/usrse24/) we aim for 300 participants.
+  - The [2023 inaugural conference](https://us-rse.org/usrse23/) and [2024](https://us-rse.org/usrse24/) were a
+    resounding success with 250 attendees in 2023 and 276 attendees in 2024.
+  - [2025](https://us-rse.org/usrse25/) takes place in October 2025 in Philidelphia.
 - [Monthly community calls](/events/#community-call)
 - [A monthly newsletter](/newsletters/)
 - 15 [working groups](/working-groups/) and [affinity groups](/about/affinity-groups/)