Add Missing link definition in README.md (#597)
Add Missing link definition in README.md (#597)

Fix markdown syntax for the Rust programming language.

The link was using a link definition without link.
Since all other links use inline style, this commit also follows this style.
bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust