Add NEWS entry for #28156: add splitpath(p) (#29448)

Author: NHDaly

NEWS.md

@@ -13,6 +13,7 @@ Language changes
 Standard Library Changes
 ------------------------
 
+  * New `splitpath(p::String)` function added, which is the opposite of `joinpath(parts...)`: it splits a filepath into its components ([#28156]).
 
 Compiler/Runtime improvements
 -----------------------------
@@ -24,3 +25,4 @@ Deprecated or removed
 
 <!--- generated by NEWS-update.jl: -->
 [#29440]: https://github.com/JuliaLang/julia/issues/29440
+[#28156]: https://github.com/JuliaLang/julia/issues/28156