Update developer_guide.md
Fix a 404
@@ -50,4 +50,4 @@ Fix all errors before submitting a PR.
To run specific tests, run `npm run test-nocov -t <regex>`, where `<regex>` is any pattern that matches the names of the test blocks that you want to run.
-See our recommendations for writing unit tests [here](https://github.com/lyft/amundsenfrontendlibrary/blob/master/docs/recommended-practices.md).
+See our recommendations for writing unit tests [here](https://github.com/lyft/amundsenfrontendlibrary/blob/master/docs/recommended_practices.md).
