Update README.md

Author: ilpropheta

README.md

@@ -1,6 +1,6 @@
 # bellamy
 
-Open URL in chromeless window
+Open URL in chromeless window.
 
 ```
 Usage: bellamy.exe [OPTIONS] [URL]
@@ -17,4 +17,4 @@ Options:
       --icon <ICON>    Path to the window icon [default: ]
   -h, --help           Print help
   -V, --version        Print version
-```
+```