Add type for IEEEContext argument

Author: donBarbos

stdlib/_decimal.pyi

@@ -65,7 +65,7 @@ else:
     def localcontext(ctx: Context | None = None) -> _ContextManager: ...
 
 if sys.version_info >= (3, 14):
-    def IEEEContext(bits, /) -> Context: ...
+    def IEEEContext(bits: int, /) -> Context: ...
 
 DefaultContext: Context
 BasicContext: Context