Update README.md

Typo fix

Author: Born2Root

README.md

@@ -6,7 +6,7 @@ In addition the player prints out the current played song.
 
 ## Usage
 - To start execute within your terminal `./radio`
-- An GUI-Window will appear, listing all the radio channels contained in `sender.csv`
+- A GUI-Window will appear, listing all the radio channels contained in `sender.csv`
 Just click the channel you want to listen, and it will be played within your shell.
 - To change the channel, just hit `Strg+C` and choose another channel in the Pop-Up window.
 - To exit, just hit `Strg+C` and exit within the GUI-Exit-Button.