Update README.md

Author: elect86

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://github.com/kotlin-graphics/kotlin-unsigned/workflows/build/badge.svg)](https://github.com/kotlin-graphics/kotlin-unsigned/actions?workflow=build)
 [![license](https://img.shields.io/badge/License-MIT-orange.svg)](https://github.com/kotlin-graphics/kotlin-unsigned/blob/master/LICENSE) 
 [![Release](https://jitpack.io/v/kotlin-graphics/kotlin-unsigned.svg)](https://jitpack.io/#kotlin-graphics/kotlin-unsigned) 
-![Size](https://github-size-badge.herokuapp.com/:owner/:repo.svg)
+![Size](https://github-size-badge.herokuapp.com/kotlin-graphics/kotlin-unsigned.svg)
 [![Github All Releases](https://img.shields.io/github/downloads/kotlin-graphics/kotlin-unsigned/total.svg)]()
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