⚙️ Improves the proxy implementation to properly support the standard environment variables http_proxy, https_proxy and no_proxy

What's Changed

• feat: switch proxy implementation by @peter-evans in https://github.com/peter-evans/create-pull-request/pull/1269

Full Changelog: https://github.com/peter-evans/create-pull-request/compare/v4.1.4...v4.2.0