fix(api): rss3 network format

Author: pseudoyu

lib/views/rss3.test.ts

@@ -1,7 +1,7 @@
 import { describe, expect, it } from 'vitest';
 import rss3 from './rss3';
 
-const NETWORK = 'RSS';
+const NETWORK = 'rsshub';
 const TAG = 'RSS';
 const TYPE = 'feed';
 

lib/views/rss3.ts

@@ -6,7 +6,7 @@ import dayjs from 'dayjs';
  * @returns `JSON.stringify`-ed [UMS Result](https://docs.rss3.io/docs/unified-metadata-schemas)
  */
 
-const NETWORK = 'RSS';
+const NETWORK = 'rsshub';
 const TAG = 'RSS';
 const TYPE = 'feed';