Update "@polkadot/api": "^14.0" for bridges zombienet tests (#5918)

Relates to: https://github.com/paritytech/polkadot-sdk/pull/5916
Relates to: https://github.com/polkadot-js/api/pull/5976

---------

Co-authored-by: Javier Viola <javier@parity.io>

bridges/testing/framework/utils/generate_hex_encoded_call/package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "license": "MIT",
   "dependencies": {
-    "@polkadot/api": "^10.11",
-    "@polkadot/util": "^12.6"
+    "@polkadot/api": "^14.0",
+    "@polkadot/util": "^13.1"
   }
 }