add news for at-invokelatest and at-invoke (#39000)

Author: aviatesk

NEWS.md

@@ -29,6 +29,8 @@ New library functions
 
 * Two argument methods `findmax(f, domain)`, `argmax(f, domain)` and the corresponding `min` versions ([#27613]).
 * `isunordered(x)` returns true if `x` is value that is normally unordered, such as `NaN` or `missing`.
+* New macro `Base.@invokelatest f(args...; kwargs...)` provides a convenient way to call `Base.invokelatest(f, args...; kwargs...)` ([#37971])
+* New macro `Base.@invoke f(arg1::T1, arg2::T2; kwargs...)` provides an easier syntax to call `invoke(f, Tuple{T1,T2}; kwargs...)` ([#38438])
 
 New library features
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