Add 'archive' tag to v2ex (#2129)

Author: dkhamsing

contents.json

@@ -5203,7 +5203,7 @@
         "news"
       ],
       "tags": [
-        "objc"
+        "objc", "archive"
       ],
       "description": "Browse the https://www.v2ex.com/ startup, designer & developer site",
       "lang": "zho",