docs: update badge color

README.md

@@ -3,7 +3,7 @@
 [![PyPI](https://badge.fury.io/py/pymittagleffler.svg)](https://pypi.org/project/pymittagleffler/)
 [![crates.io](https://img.shields.io/crates/v/mittagleffler)](https://crates.io/crates/mittagleffler)
 [![readthedocs.io](https://img.shields.io/readthedocs/mittagleffler?label=rtd.io&color=%234280B2)](https://mittagleffler.readthedocs.io/en/latest)
-[![docs.rs](https://img.shields.io/docsrs/mittagleffler?label=docs.rs&color=%23B6690D)](https://docs.rs/mittagleffler/latest/mittagleffler/)
+[![docs.rs](https://img.shields.io/docsrs/mittagleffler?label=docs.rs&color=%23F58042)](https://docs.rs/mittagleffler/latest/mittagleffler/)
 
 <div align="center">
 <img width="600" src="https://raw.githubusercontent.com/alexfikl/mittagleffler/refs/heads/main/python/docs/_static/mittag-leffler-accuracy-contour.png"/><br>