fix: input readonly's id (#203)

Author: alfianchii

src/form-element-input.html

@@ -54,7 +54,7 @@ <h4 class="card-title">Basic Inputs</h4>
                                 disabled>
                         </div>
                         <div class="form-group">
-                            <label for="disabledInput">Readonly Input</label>
+                            <label for="readonlyInput">Readonly Input</label>
                             <input type="text" class="form-control" id="readonlyInput" readonly="readonly"
                                 value="You can't update me :P">
                         </div>