chore(deps): bump @walletconnect/sign-client from 2.20.1 to 2.21.4

---
updated-dependencies:
- dependency-name: "@walletconnect/sign-client"
  dependency-version: 2.21.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/thirdweb/package.json

@@ -26,7 +26,7 @@
     "@thirdweb-dev/engine": "workspace:*",
     "@thirdweb-dev/insight": "workspace:*",
     "@walletconnect/ethereum-provider": "2.20.1",
-    "@walletconnect/sign-client": "2.20.1",
+    "@walletconnect/sign-client": "2.21.4",
     "abitype": "1.0.8",
     "cross-spawn": "7.0.6",
     "fuse.js": "7.1.0",