fix: update buffer-layout to fix downstream bundler issues (#18529)

* fix: update buffer-layout to fix downstream bundler issues

* chore: run check on generated type declaration

web3.js/src/account.ts

@@ -1,5 +1,6 @@
 import * as nacl from 'tweetnacl';
 import type {SignKeyPair as KeyPair} from 'tweetnacl';
+import type {Buffer} from 'buffer';
 
 import {toBuffer} from './util/to-buffer';
 import {PublicKey} from './publickey';