Fix links

Author: DCzajkowski

Diff for: README.md

@@ -10,10 +10,10 @@
   * [With a CDN](#with-a-cdn)
 * [Usage](#usage)
   * [With an ES6 bundler (via NPM)](#with-an-es6-bundler-via-npm)
-    * [Importing a component](importing-a-component)
-    * [Importing CSS styles](importing-css-styles)
-      * [Via an import](via-an-import)
-      * [Via a <style> tag](via-a-style-tag)
+    * [Importing a component](#importing-a-component)
+    * [Importing CSS styles](#importing-css-styles)
+      * [Via an import](#via-an-import)
+      * [Via a <style> tag](#via-a-style-tag)
   * [With a CDN](#with-a-cdn)
   * [Simple example](#simple-example)
   * [Simple example with content slot](#simple-example-with-content-slot)