fix whitespace

src/components/menu-item/menu-item.styles.ts

@@ -25,6 +25,7 @@ export default css`
     white-space: nowrap;
     cursor: pointer;
   }
+
   .menu-item.menu-item--disabled {
     outline: none;
     color: rgb(var(--sl-color-neutral-400));

src/components/menu-item/menu-item.ts

@@ -61,9 +61,13 @@ export default class SlMenuItem extends LitElement {
           'menu-item--disabled': this.disabled
         })}
       >
-        <span part="checked-icon" class="menu-item__check">
-          <sl-icon name="check" library="system" aria-hidden="true"></sl-icon>
-        </span>
+        <sl-icon
+          part="checked-icon"
+          class="menu-item__check"
+          name="check"
+          library="system"
+          aria-hidden="true"
+        ></sl-icon>
 
         <span part="prefix" class="menu-item__prefix">
           <slot name="prefix"></slot>