[skip ci] Fix typo in NEWS

Author: TimWolla

NEWS

@@ -11,7 +11,7 @@ PHP                                                                        NEWS
     function triggered by bailout in php_output_lock_error()). (timwolla)
   . Fix OSS-Fuzz #471533782 (Infinite loop in GC destructor fiber). (ilutov)
   . Fix OSS-Fuzz #472563272 (Borked block_pass JMP[N]Z optimization). (ilutov)
-  . Fixed bug GH-GH-20914 (Internal enums can be cloned and compared). (Arnaud)
+  . Fixed bug GH-20914 (Internal enums can be cloned and compared). (Arnaud)
   . Fix OSS-Fuzz #474613951 (Leaked parent property default value). (ilutov)
 
 - MbString: