docs(Vue Testing Library): update stubs-example link branch name from master to main in faq page

Author: ytak-sagit

docs/vue-testing-library/faq.mdx

@@ -158,6 +158,6 @@ Links:
 [vue-test-utils]: https://github.com/vuejs/vue-test-utils
 [mount]: https://test-utils.vuejs.org/api/#mount
 [stubs]: https://test-utils.vuejs.org/api/#global-stubs
-[stubs-example]: https://github.com/testing-library/vue-testing-library/blob/master/src/__tests__/stubs.js
+[stubs-example]: https://github.com/testing-library/vue-testing-library/blob/main/src/__tests__/stubs.js
 
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