docs: correct <Mask/>'s children type in README

README.md

@@ -2339,7 +2339,7 @@ Masks use the stencil buffer to cut out areas of the screen. This is usually che
   /** If depth  of the masks own material will leak through, default: false */
   depthWrite?: boolean
   /** children must define a geometry, a render-prop function is allowed which may override the default material */
-  children: (spread: MaskSpread) => React.ReactNode | React.ReactNode
+  children: ((spread: MaskSpread) => React.ReactNode) | React.ReactNode
 />
 ```