Update documentation badge links in README

Author: hotung1027

README.md

@@ -5,7 +5,7 @@
   </p>
   <p align="center">
     <a href="https://github.com/hotung1027/anyiostream/actions/workflows/ci.yml"><img src="https://github.com/hotung1027/anyiostream/actions/workflows/ci.yml/badge.svg" alt="CI"></a>
-    <a href="https://github.com/hotung1027/anyiostream/actions"><img src="https://img.shields.io/github/actions/workflow/status/hotung1027/anyiostream/docs.yml?branch=main&style=flat-square" alt="doc"></a>
+    <a href="https://anyiostream.readthedocs.io/latest/"><img src="https://app.readthedocs.org/projects/anyiostream/badge/?version=latest&style=flat" alt="latest"></a>
     <a href="https://pypi.org/project/anyiostream/"><img src="https://img.shields.io/pypi/v/anyiostream?" alt="PyPI"></a>
     <a href="https://pypi.org/project/anyiostream/"><img src="https://img.shields.io/pypi/pyversions/anyiostream?" alt="Python"></a>
     <a href="LICENSE"><img src="https://img.shields.io/github/license/hotung1027/anyiostream?style=flat-square" alt="License"></a>