Remove leading 'v' from latest tag in getLatestTag

Updated the getLatestTag function to strip a leading 'v' character from the latest tag before returning it. This ensures tag values are returned without the 'v' prefix.

packages/napcat-common/src/helper.ts

@@ -268,7 +268,8 @@ export async function getLatestTag (): Promise<string> {
   if (!latest) {
     throw new Error('No tags found');
   }
-  return latest;
+  // 去掉开头的 v
+  return latest.replace(/^v/, '');
 }