Modify README.md slightly

Author: ivanbgd

README.md

@@ -1,7 +1,7 @@
 # Reduce Image Size
 
 [![license](https://img.shields.io/badge/License-MIT-blue.svg?style=flat)](LICENSE)
-[![crates.io](https://img.shields.io/crates/v/reduce_image_size)][crates.io link]
+[![crates.io](https://img.shields.io/crates/v/reduce_image_size.svg)][crates.io link]
 [![downloads](https://img.shields.io/crates/d/reduce_image_size.svg)][crates.io link]  
 [![docs.rs](https://docs.rs/reduce_image_size/badge.svg)](https://docs.rs/reduce_image_size/)
 [![CI](https://github.com/ivanbgd/reduce-image-size-rust/actions/workflows/ci.yml/badge.svg)](https://github.com/ivanbgd/reduce-image-size-rust/actions/workflows/ci.yml)