doc: update Github workflow badge

Author: bryanmylee

README.md

@@ -8,7 +8,7 @@
 [![npm version](http://img.shields.io/npm/v/svelte-headless-table.svg)](https://www.npmjs.com/package/svelte-headless-table)
 [![npm downloads](https://img.shields.io/npm/dm/svelte-headless-table.svg)](https://www.npmjs.com/package/svelte-headless-table)
 ![license](https://img.shields.io/npm/l/svelte-headless-table)
-![build](https://img.shields.io/github/workflow/status/bryanmylee/svelte-headless-table/publish)
+![build](https://img.shields.io/github/actions/workflow/status/bryanmylee/svelte-headless-table/publish.yml)
 
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