Update polkadot.json

Swap out futureproof for weatherproof.

Author: kureus

candidates/polkadot.json

@@ -2255,8 +2255,8 @@
     },
     {
       "slotId": 275,
-      "name": "futureproof",
-      "stash": "13unkT9DyFUnzKZdLCkHBvGLuhvcHQSrRhTWhrL9gqG98CTH",
+      "name": "weatherproof",
+      "stash": "12KzKVWqYqyEXx4RpPLvbPTakfrhNgfXeTWSR65CF8ZrFHrt",
       "kusamaStash": "J3f7ULfjVbbBYvZtMvaEDiUC8odXjt2A2hGShshBFCKHazY",
       "riotHandle": [
         "@firegrass:matrix.org",