Update README.md

Author: tomtar00

README.md

@@ -13,7 +13,7 @@ or add `shared_lib` to your `Cargo.toml` file.
 
 ## Usage
 
-```
+```rust
 use shared_lib::*;
 use std::path::PathBuf;
 
@@ -30,4 +30,4 @@ fn main() {
 
 [Documentation](https://docs.rs/shared_lib/latest/shared_lib/)
 
-This library is available under the MIT License
+This library is available under the MIT License