docs: correct template syntax (#1797)

* Update getting-started.md

Fix the incorrect Mustache syntax in the example

* Update getting-started.md

* Update getting-started.md

docs/src/guide/getting-started.md

@@ -219,7 +219,7 @@ const y = computed(() => `${Math.round(props.position.y)}px`)
     <div>{{ data.label }}</div>
 
     <div>
-      {x} {y}
+      {{ x }} {{ y }}
     </div>
 
     <Handle type="source" :position="Position.Bottom" />
@@ -418,7 +418,7 @@ const y = computed(() => `${Math.round(props.position.y)}px`)
     <div>{{ data.label }}</div>
 
     <div>
-      {x} {y}
+      {{ x }} {{ y }}
     </div>
 
     <Handle type="source" :position="Position.Bottom" />