Add 'archive' tag to GiTiny (#2241)

Author: dkhamsing

contents.json

@@ -19254,7 +19254,7 @@
         "swift",
         "rxswift",
         "mvvm-c",
-        "clean-architecture"
+        "clean-architecture", "archive"
       ],
       "screenshots": [
         "https://user-images.githubusercontent.com/15151687/57021987-bc1e1f00-6c68-11e9-8d43-25beb9465284.jpg",