fix(ci): update expired sepolia ENS fixture in lookupDomains test (#482)

The sepolia lookup test asserted `testchaitu.eth`, a wrapped ENS name on
sepolia that expired on 2026-07-01 (expiryDate 1782909240). lookupDomains
filters out expired domains, so the name is correctly dropped and CI has
failed on master since expiry. Switch the assertion to `chaitu.eth`, which
the same account owns with an expiry in 2038, keeping the sepolia routing
check intact without the time-brittle fixture.

Co-authored-by: Tony <222686154+tony8713@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: tony8713

test/integration/lookupDomains.test.ts

@@ -12,7 +12,7 @@ describe('lookupDomains', () => {
   it('should return an array of addresses on sepolia', async () => {
     const result = await lookupDomains('0x24F15402C6Bb870554489b2fd2049A85d75B982f', '11155111');
 
-    expect(result).toContain('testchaitu.eth');
+    expect(result).toContain('chaitu.eth');
   });
 
   it('should return an empty array if the address is not provided', async () => {