linux: fixed build instructions for ubuntu (#183)

Fixed build instructions

Ubuntu/Debian should use libssl-dev as libssl-devel does not exist

Author: Raspberrynani

linux/README.md

@@ -33,7 +33,7 @@ A native Linux application to control your AirPods, with support for:
     sudo pacman -S openssl
 
     # For Debian / Ubuntu
-    sudo apt-get install libssl-devel
+    sudo apt-get install libssl-dev
 
     # For Fedora
     sudo dnf install openssl-devel