fix header

Author: Idrinth

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@idrinth-api-bench/rollup-plugin-react-modular-css",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Provides a plugin to split css files out separately.",
   "main": "src/index.js",
   "repository": {

src/load.ts

@@ -1,6 +1,6 @@
 export default (hash: string, name: string) => {
     const global = window || this || {};
-    const header = global.document.getElementsByTagName('header')[0];
+    const header = global.document.getElementsByTagName('head')[0];
     const path = `/assets/${name}-${hash}.min.css`;
     if (global.document.querySelector(`link[href='${ path }']`)) {
         return;