[Documentation] Ardunio IDE Configuration - obsolete link for package_esp32_index.json

[onemoretime]

Hello !!
The link provided in PDF Tutorial leads to an HTTP error 404.

Old link (PDF page 22): https://raw.githubusercontent.com/espressif/arduino-esp32/ghpages/
package_esp32_index.json

New link: https://espressif.github.io/arduino-esp32/package_esp32_index.json