feat(cache): cosmetic cache validation logic

The cache validation logic in `getCache` function has been updated.
Previously, it returned the cache data if it ended with `hashComment`.
Now, it returns null if the data does not end with `hashComment`,
indicating that it's not a valid cache. This change improves the
accuracy of cache validation.

packages/unplugin-typia/src/core/cache.ts

@@ -51,11 +51,12 @@ export async function getCache(
 
 	const hashComment = await getHashComment(key);
 
-	if (data.endsWith(hashComment)) {
-		return wrap<Data>(data);
+	/* if data does not end with hashComment, the cache is invalid */
+	if (!data.endsWith(hashComment)) {
+		return null;
 	}
 
-	return null;
+	return wrap<Data>(data);
 }
 
 /**