chore(test/browser): bump test total in fix-4686

Brings specs/fix-4686.test.mjs up to date with the additional test case
added in commit 285bc61.

test/browser/specs/fix-4686.test.mjs

@@ -10,8 +10,8 @@ const {
 } = await runVitest(['--config', 'vitest.config-basepath.mts'])
 
 await test('tests run in presence of config.base', async () => {
-  assert.ok(browserResultJson.testResults.length === 8, 'Not all the tests have been run')
-  assert.ok(passedTests.length === 7, 'Some tests failed')
+  assert.ok(browserResultJson.testResults.length === 9, 'Not all the tests have been run')
+  assert.ok(passedTests.length === 8, 'Some tests failed')
   assert.ok(failedTests.length === 1, 'Some tests have passed but should fail')
 
   assert.doesNotMatch(stderr, /Unhandled Error/, 'doesn\'t have any unhandled errors')