Make binary plural in the README

Signed-off-by: Daniel Egger <[email protected]>

Author: Daniel Egger

README.md

@@ -22,7 +22,7 @@ The toolkit currently provides these parts:
 
 1. [The Rusp library (aptly named: rusp-lib)](https://github.com/axiros/rusp/tree/master/rusp-lib)
 2. [The Rhai-Rusp library](https://github.com/axiros/rusp/tree/master/rhai-rusp)
-3. [The Rusp binary](https://github.com/axiros/rusp/tree/master/rusp-bin)
+3. [The Rusp binaries](https://github.com/axiros/rusp/tree/master/rusp-bin)
 
 ## What else?