add integration test

Author: aaronmcadam

exercises/02.vitest-browser-mode/05.problem.multiple-workspaces/README.mdx

@@ -1,6 +1,6 @@
 # Multiple workspaces
 
-Our current Vitest configuration runs _all tests_ in Browser Mode. This isn't ideal when you need to run different types of tests in the same project - like unit tests in Node.js alongside browser-based component tests.
+Our current Vitest configuration runs _all tests_ in Browser Mode. This isn't ideal when you need to run different types of tests in the same project - like unit and integration tests in Node.js alongside browser-based component tests.
 
 You can fix this by introducing _different workspaces_ for different types of tests. In fact, I think this is just the right task for you...