fix release date

Author: remicollet

NEWS

@@ -20,7 +20,7 @@ PHP                                                                        NEWS
 - Spl:
   . Fixed bug #78976 (SplFileObject::fputcsv returns -1 on failure). (cmb)
 
-19 Dec 2019, PHP 7.4.1
+18 Dec 2019, PHP 7.4.1
 
 - Core:
   . Fixed bug #78810 (RW fetches do not throw "uninitialized property"