Update dependency @phosphor-icons/core to ^2.1.1

Author: renovate[bot]

frontend/package.json

@@ -22,7 +22,7 @@
     "@metamask/jazzicon": "^2.0.0",
     "@oasisprotocol/dapp-voting-backend": "workspace:^",
     "@oasisprotocol/sapphire-paratime": "^1.3.2",
-    "@phosphor-icons/core": "^2.0.8",
+    "@phosphor-icons/core": "^2.1.1",
     "ethers": "6.10.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",