docs: update content

docs/src/demos/Nodes/TaskList/index.vue

@@ -1,6 +1,6 @@
 <template>
   <div v-if="editor">
-    <button @click="editor.chain().focus().toggleTaskList().run()" :class="{ 'is-active': editor.isActive('task_list') }">
+    <button @click="editor.chain().focus().toggleTaskList().run()" :class="{ 'is-active': editor.isActive('taskList') }">
       task list
     </button>
 

docs/src/docPages/guide/configuration.md

@@ -56,7 +56,7 @@ new Editor({
 })
 ```
 
-### Configure an extensions
+### Configure extensions
 Most extensions can be configured. Add a `.configure()` to pass an object to it. The following example will disable the default heading levels 4, 5 and 6:
 
 ```js