Add new operator to NEWS.md

Author: pthariensflame

NEWS.md

@@ -5,6 +5,9 @@ New language features
 ---------------------
 
   - New `Base.@acquire` macro for a non-closure version of `Base.acquire(f, s::Base.Semaphore)`, like `@lock`. ([#56845])
+  - The character U+1F8B2 🢲 (RIGHTWARDS ARROW WITH LOWER HOOK), newly added by Unicode 16,
+    is now a valid operator with arrow precedence, accessible as `\hookunderrightarrow` at the REPL.
+    ([JuliaLang/JuliaSyntax.jl#525], [#57143])
 
 Language changes
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