fix missing WETH address on Sepolia Testnet

Author: mikoim

sdks/sdk-core/src/entities/weth9.ts

@@ -12,6 +12,7 @@ export const WETH9: { [chainId: number]: Token } = {
 
   10: new Token(10, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
   69: new Token(69, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
+  11155111: new Token(11155111, '0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14', 18, 'WETH', 'Wrapped Ether'),
   11155420: new Token(11155420, '0x4200000000000000000000000000000000000006', 18, 'WETH', 'Wrapped Ether'),
 
   42161: new Token(42161, '0x82aF49447D8a07e3bd95BD0d56f35241523fBab1', 18, 'WETH', 'Wrapped Ether'),