[skip ci] update NEWS

Author: ericmann

NEWS

@@ -53,7 +53,7 @@ PHP                                                                        NEWS
   . Fixed bug GH-14290 (Member access within null pointer in extension spl).
     (nielsdos)
 
-23 May 2024, PHP 8.3.8RC1
+06 June 2024, PHP 8.3.8
 
 - CGI:
   . Fixed buffer limit on Windows, replacing read call usage by _read.