fix out of place entry in NEWS.md (#51459)

`pmap` is part of the Distributed std lib

Author: oxinabox

NEWS.md

@@ -39,8 +39,6 @@ New library features
 Standard library changes
 ------------------------
 
-* `pmap` now defaults to using a `CachingPool` ([#33892]).
-
 #### Package Manager
 
 #### LinearAlgebra
@@ -74,6 +72,8 @@ Standard library changes
 
 #### Distributed
 
+* `pmap` now defaults to using a `CachingPool` ([#33892]).
+
 #### Unicode