Update README.md

Author: gwbres

README.md

@@ -5,7 +5,7 @@ Rust package to parse and generate CGGTTS data.
 
 [![crates.io](https://img.shields.io/crates/v/cggtts.svg)](https://crates.io/crates/cggtts)
 [![Rust](https://github.com/gwbres/cggtts/actions/workflows/rust.yml/badge.svg)](https://github.com/gwbres/cggtts/actions/workflows/rust.yml)
-[![crates.io](https://docs.rs/cggtts/badge.svg)](https://docs.rs/cggtts/badge.svg)
+[![crates.io](https://docs.rs/cggtts/badge.svg)](https://docs.rs/cggtts/)
 [![crates.io](https://img.shields.io/crates/d/cggtts.svg)](https://crates.io/crates/cggtts)    
 
 CGGTTS is a file format designed to describe a local clock state compared to GNSS time systems.