Link to examples returns 404

The example link https://bazel-contrib.github.io/rules_cuda/0.2.1/examples in https://bazel-contrib.github.io/rules_cuda/0.2.1/ returns 404. When building docs myself, there is a warning `Doc file 'index.md' contains an unrecognized relative link './examples', it was left as is.`.

Start with the generated 0.2.1 documentation and the index.md file identified by the build warning. Inspect the relative ./examples link and the corresponding generated path; done means the examples link resolves and the warning no longer appears when building the docs.

Written by the indexing model from the issue text.