Update taxonomy.json

taxonomy.json

@@ -149,7 +149,10 @@
       {"name": "Biomedical NLP"}
      ]
     },
-    {"name": "NLP for Social Media"},
+    {"name": "NLP for News and Media",
+      "children":[
+        {"name": "NLP for Social Media"}
+      ]
     {"name": "NLP for Climate"},
     {"name": "NLP for the Legal Domain"},
     {"name": "NLP for Finance"},