Change save-the-date to registration-is-open (ProjectPythia#507)

Author: ktyle

portal/posts/cookoff2025-website.md

@@ -1,13 +1,13 @@
 ---
 blogpost: true
-date: Feb 20, 2025
-author: Julia Kent
+date: Jun 03, 2025
+author: Kevin Tyle
 tags: cook-off
 ---
 
-# Save the date for the 2025 Cook-off hackathon!
+# Register now for the 2025 Cook-off hackathon!
 
 The 2025 Pythia Cookbook Cook-Off Hackathon will take place August
 5-8, at the NCAR Mesa Lab, located in Boulder, Colorado.
 
-[The website for the event is live](https://projectpythia.org/pythia-cookoff-2025/). Registration is not open at this time.
+[The website for the event is live](https://projectpythia.org/pythia-cookoff-2025/). Registration is now open!