docs(): add missing property docs

core/src/components/loading/loading.tsx

@@ -32,6 +32,8 @@ export class Loading implements OverlayInterface {
   @Prop({ connect: 'ion-animation-controller' }) animationCtrl!: HTMLIonAnimationControllerElement;
   @Prop({ context: 'config' }) config!: Config;
   @Prop() overlayId!: number;
+
+  /** If true, the loading will blur any inputs and hide the keyboard */
   @Prop() keyboardClose = true;
 
   /**