Update URL to HTTPS

Author: TotalCaesar659

README.md

@@ -48,7 +48,7 @@ The following sites are currently supported:
 
 ## License
 
-[![GNU GPLv3 Image](https://www.gnu.org/graphics/gplv3-127x51.png)](http://www.gnu.org/licenses/gpl-3.0.en.html)  
+[![GNU GPLv3 Image](https://www.gnu.org/graphics/gplv3-127x51.png)](https://www.gnu.org/licenses/gpl-3.0.en.html)  
 
 NewPipe is Free Software: You can use, study share and improve it at your
 will. Specifically you can redistribute and/or modify it under the terms of the