Fix install instructions
error: Using `cargo install` to install the binaries for the package in current working directory is no longer supported, use `cargo install --path .` instead. Use `cargo build` if you want to simply build the package.
@@ -115,7 +115,7 @@ Installation Instructions
Likewise, installing can simply be done using:
```bash
-$ cargo install
+$ cargo install --path .
```
This command will install uutils into Cargo's *bin* folder (*e.g.* `$HOME/.cargo/bin`).
