chore(emit-parent): improve Svelte example clarity to match Vue examples

content/4-component-composition/2-emit-to-parent/svelte/AnswerButton.svelte

@@ -2,8 +2,16 @@
   import { createEventDispatcher } from "svelte";
 
   const dispatch = createEventDispatcher();
+
+  function clickYes() {
+    dispatch("yes");
+  }
+
+  function clickNo() {
+    dispatch("no");
+  }
 </script>
 
-<button on:click={() => dispatch("yes")}> YES </button>
+<button on:click={clickYes}> YES </button>
 
-<button on:click={() => dispatch("no")}> NO </button>
+<button on:click={clickNo}> NO </button>