update formatting

Author: yuanchi2807

codeflare/tests/README.md

@@ -4,8 +4,8 @@ Test framework for ray-pipeline
 
 Contents:
 
-* [Use pytest as test framework] #use-pytest-as-test-framework
-* [Unit test coverage] #unit-test-coverage
+* [Use pytest as test framework](#use-pytest-as-test-framework)
+* [Unit test coverage](#unit-test-coverage)
 
 ## Use pytest as test framework