Update README.md NOTE

Author: petamoriken

README.md

@@ -1,3 +1,7 @@
+> [!NOTE]
+> [Float16 proposal has been included in the ES2025 specification.](https://github.com/tc39/ecma262/pull/3532) In modern environments, there is no need to load this ponyfill.
+> Please refer to [the Web Platform Status](https://webstatus.dev/features/float16array) for browser implementation status.
+
 # <a href="https://github.com/petamoriken/float16">float16</a>
 
 <p align="center">
@@ -25,6 +29,10 @@
 
 ### Node.js
 
+> [!NOTE]
+> Native float16 features are supported since
+> [Node.js v24.0.0](https://nodejs.org/en/blog/release/v24.0.0).
+
 ```console
 npm install @petamoriken/float16
 ```