chore(deps): update dependency @api3/contracts to v31 (#242)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "firebase:emulator": "pnpm docs:build; firebase emulators:start"
   },
   "devDependencies": {
-    "@api3/contracts": "^30.0.0",
+    "@api3/contracts": "^31.0.0",
     "@api3/dapi-management": "^3.63.0",
     "@types/node": "^22.18.6",
     "axios": "^1.12.2",