Fix code of conduct link in covenant badge

README.md

@@ -93,7 +93,7 @@ for general questions and discussion, and please direct specific questions to
 The TensorFlow project strives to abide by generally accepted best practices in open-source software development:
 
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1486/badge)](https://bestpractices.coreinfrastructure.org/projects/1486)
-[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](code-of-conduct.md)
+[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 
 ## Continuous build status