Update Solomon Islands.json (#225)

Local user added missing wards

Author: acamat

ExpectedStateOfAdmins/Solomon Islands.json

@@ -22,7 +22,14 @@
       2798423,
       2798426,
       2798446,
-      2798447
+      2798447,
+      20256864,
+      20257917,
+      20258377,
+      20258376,
+      20258375,
+      20258374,
+      20261313
     ]
   }
 }