Update URL to point to upstream repository (#3187)

Pointing to an old fork is misleading.

libraries/HTTPClient/library.properties

@@ -2,8 +2,8 @@ name=HTTPClient
 version=1.2
 author=Markus Sattler
 maintainer=Markus Sattler
-sentence=http Client for ESP32
+sentence=HTTP Client for ESP32
 paragraph=
 category=Communication
-url=https://github.com/Links2004/Arduino/tree/libraries/ESP8266HTTPClient
+url=https://github.com/espressif/arduino-esp32/tree/master/libraries/HTTPClient
 architectures=esp32