Update authors notification deadline to 18 July 2025.

Author: yegor256

pages/2025.md

@@ -156,7 +156,7 @@ Project submission:\
 ~~31 May~~ 9 June 2025 ([Anywhere on Earth][AoE])
 
 Authors notification:\
-~~1~~ 10 July 2025
+~~1~~ 18 July 2025
 
 ## How to Submit # {#submit}