docs: fix closing html tag

README.md

@@ -8,7 +8,7 @@
 <a href="https://docs.rs/rustic-rs/"><img src="https://img.shields.io/docsrs/rustic-rs?style=flat&amp;labelColor=1c1d42&amp;color=4f396a&amp;logo=Rust&amp;logoColor=white" /></a>
 <a href="https://raw.githubusercontent.com/rustic-rs/rustic/main/"><img src="https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg" /></a>
 <a href="https://crates.io/crates/rustic-rs"><img src="https://img.shields.io/crates/d/rustic-rs.svg" /></a>
-<a href="https://github.com/rustic-rs/rustic/actions/workflows/nightly.yml"><img src="https://github.com/rustic-rs/rustic/actions/workflows/nightly.yml/badge.svg" />
+<a href="https://github.com/rustic-rs/rustic/actions/workflows/nightly.yml"><img src="https://github.com/rustic-rs/rustic/actions/workflows/nightly.yml/badge.svg" /></a>
 <p>
 
 ## About