docs(form): change example from textarea to code-editor

Author: paulinewahle

src/components/form/examples/dynamic-form.scss

@@ -1,4 +1,3 @@
-textarea {
+limel-code-editor {
     width: 100%;
-    min-height: 300px;
 }

src/components/form/examples/dynamic-form.tsx

@@ -45,7 +45,14 @@ export class DynamicFormExample {
 
     public render() {
         return [
-            <textarea onChange={this.handleTextChange}>{this.text}</textarea>,
+            <limel-code-editor
+                language="json"
+                lineNumbers={true}
+                lint={true}
+                fold={true}
+                onChange={this.handleTextChange}
+                value={this.text}
+            />,
             <br />,
             <limel-form
                 onChange={this.handleFormChange}