link to sdk reference (#1831)
link to sdk reference (#1831)

* link to sdk reference 

added a link to the SDK reference to the readme

* Update README.md

added line break

Co-authored-by: NachoSoto <507ff30e0bf0a72b91220e699c0d3e3a0f108b80@users.noreply.github.com>

Co-authored-by: NachoSoto <507ff30e0bf0a72b91220e699c0d3e3a0f108b80@users.noreply.github.com>
RevenueCat/purchases-ios,RevenueCat/purchases-ios,RevenueCat/purchases-ios,RevenueCat/purchases-ios,RevenueCat/purchases-ios