Updates README examples

Author: maciejlew

README.md

@@ -64,7 +64,7 @@ api 'pl.smsapi:smsapi-lib:2.5'
 
 ## How to use
 
-To use SMSAPI.PL set proxy URL to **https//api.smsapi.pl/**.
+To use SMSAPI.PL set proxy URL to **https://api.smsapi.pl/**.
 To use SMSAPI.COM set proxy URL to **https://api.smsapi.com/**.
 
 ### How to send SMS