Auto merge of rust-lang#3798 - eyko:patch-1, r=flip1995

Fix broken link in README

I noticed the link to the lint list had a typo, so this PR is just that:

```diff
- [lint list]](https://rust-lang.github.io/rust-clippy/master/index.html)
+ [lint list](https://rust-lang.github.io/rust-clippy/master/index.html)
```

Author: bors