Add docs badges even not found for now

Author: khagankhan

README.md

@@ -1,6 +1,7 @@
 # Trait Requirement Reduction
 
 [![Crates.io](https://img.shields.io/crates/v/trait-winnower.svg)](https://crates.io/crates/trait-winnower)
+[![Documentation](https://docs.rs/trait-winnower/badge.svg)](https://docs.rs/trait-winnower/)
 [![Codecov](https://codecov.io/github/AFLplusplus/trait-winnower/coverage.svg?branch=main)](https://codecov.io/gh/AFLplusplus/trait-winnower)
 [![Dependency status](https://deps.rs/repo/github/AFLplusplus/trait-winnower/status.svg)](https://deps.rs/repo/github/AFLplusplus/trait-winnower)