markdown badge

Author: mlund

README.md

@@ -5,6 +5,9 @@
     <a href="https://opensource.org/licenses/Apache-2.0">
         <img src="https://img.shields.io/badge/License-Apache%202.0-blue.svg">
     </a>
+    <a href="https://github.com/mlund/duello/actions/workflows/rust.yml">
+        <img src="https://github.com/mlund/duello/actions/workflows/rust.yml/badge.svg">
+    </a>
 </p>
 
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