Fixes #5143: yii\bootstrap\ActiveField::label() should not encode label if it is explicitly specified. [skip ci]

ActiveField.php

@@ -373,11 +373,11 @@ class ActiveField extends \yii\widgets\ActiveField
                 unset($options['label']);
             } else {
                 $attribute = Html::getAttributeName($this->attribute);
-                $label = $this->model->getAttributeLabel($attribute);
+                $label = Html::encode($this->model->getAttributeLabel($attribute));
             }
         }
         $this->parts['{beginLabel}'] = Html::beginTag('label', $options);
         $this->parts['{endLabel}'] = Html::endTag('label');
-        $this->parts['{labelTitle}'] = Html::encode($label);
+        $this->parts['{labelTitle}'] = $label;
     }
 }