Update genai/test/imggen-raw-reference-with-txt-img.test.js

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: Guiners

genai/test/imggen-raw-reference-with-txt-img.test.js

@@ -23,7 +23,7 @@ const sample = require('../image-generation/imggen-raw-reference-with-txt-img');
 const {delay} = require('./util');
 const {createOutputGcsUri} = require('./imggen-util');
 describe('imggen-raw-reference-with-txt-img', () => {
-  it('should return a GCS URI string', async function () {
+  it('should return an array of generated image URIs', async function () {
     this.timeout(180000);
     this.retries(4);
     const output = await createOutputGcsUri();