docs: add link to testing-library guidlines

README.md

@@ -1,6 +1,6 @@
 # vitest-browser-vue
 
-Render Vue components in Vitest Browser Mode. This library follows `testing-library` principles and exposes only [locators](https://vitest.dev/guide/browser/locators) and utilities that encourage you to write tests that closely resemble how your Vue components are used.
+Render Vue components in Vitest Browser Mode. This library follows [`testing-library` principles](https://testing-library.com/docs/guiding-principles/) and exposes only [locators](https://vitest.dev/guide/browser/locators) and utilities that encourage you to write tests that closely resemble how your Vue components are used.
 
 Requires `vitest` and `@vitest/browser` 2.1.0 or higher.