add to NEWS

Author: mcabbott

NEWS.md

@@ -30,8 +30,11 @@ New library functions
 
 New library features
 --------------------
-The `initialized=true` keyword assignment for `sortperm!` and `partialsortperm!`
-is now a no-op ([#47979]). It previously exposed unsafe behavior ([#47977]).
+
+- The `initialized=true` keyword assignment for `sortperm!` and `partialsortperm!`
+  is now a no-op ([#47979]). It previously exposed unsafe behavior ([#47977]).
+
+- New methods `allequal(f, itr)` and `allunique(f, itr)` taking a predicate function ([#47679]).
 
 Standard library changes
 ------------------------