Fix url to the project homepage in package.json

[tagliala]

The old unsecure URL returned a 404. This commit fixes the project homepage by pointing to the correct URL, taken from GitHub

[ci skip]

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Use case: this url is visible and clickable when in example you run yarn outdated in the console

$ yarn outdated
yarn outdated v1.22.19
Package                                  Current Wanted Latest  Package Type    URL                                                           
hotkeys-js                               3.10.4  3.11.0 3.11.0  dependencies    http://jaywcjlove.github.io/hotkeys                           
✨  Done in 6.51s.