chore: update banner

Author: elphabetsoop

src/content/_meta.yaml

@@ -1,7 +1,7 @@
 announcement:
   enabled: true
   description: >-
-    If you're stopping by ICT's SIG Fiesta, welcome! Feel free to ask us any questions you have about our club, or just say hi! 👋
+    If you're stopping by ICT's Open House, welcome! Feel free to ask us any questions you have about our club, or just say hi! 👋
   # url: https://forms.office.com/r/46tigKSLzz
 
 navbar: