fix: lint error: url

Author: kakopappa

library.properties

@@ -5,7 +5,7 @@ maintainer=Boris Jaeger <[email protected]>
 sentence=Library for https://sinric.pro - simple way to connect your device to alexa
 paragraph=Simple way to control your IOT development boards like ESP8226 or ESP32 with Amazon Alexa or Google Home
 category=Communication
-url=https://sinricpro.github.io/esp8266-esp32-sdk/index.html
+url=https://github.com/sinricpro/esp8266-esp32-sdk/
 architectures=esp8266,esp32,rp2040
 repository=https://github.com/sinricpro/esp8266-esp32-sdk.git
 license=CC-BY-SA