Fix a broken link in CONTRIBUTING.md (pytorch#44701)

Summary:
as the title says :)

Pull Request resolved: pytorch#44701

Reviewed By: ngimel

Differential Revision: D23724919

Pulled By: mrshenli

fbshipit-source-id: 5ca5ea974ee6a94ed132dbe7892a9b4b9c3dd9be

CONTRIBUTING.md

@@ -825,8 +825,9 @@ static_assert(std::is_same(A*, decltype(A::singleton()))::value, "hmm");
 
 [Clang-Tidy](https://clang.llvm.org/extra/clang-tidy/index.html) is a C++
 linter and static analysis tool based on the clang compiler. We run clang-tidy
-in our CI to make sure that new C++ code is safe, sane and efficient. See our
-[.travis.yml](https://github.com/pytorch/pytorch/blob/master/.travis.yml) file
+in our CI to make sure that new C++ code is safe, sane and efficient. See the
+[`clang-tidy` job in our GitHub Workflow's
+lint.yml file](https://github.com/pytorch/pytorch/blob/master/.github/workflows/lint.yml)
 for the simple commands we use for this.
 
 To run clang-tidy locally, follow these steps: