Use Branch Link for Sandbox Program sign-ups

Author: agerstner-branch

README.md

@@ -6,7 +6,7 @@ The Branch iOS SDK for deep linking and attribution.
 >
 > As part of this [sandbox program](https://help.branch.io/developers-hub/docs/branch-sandbox-program), you will be able to partner directly with Branch’s Product and Engineering team for exclusive access to test drive our innovative products before the market and proactively exchange valuable feedback. With your support, we will create the winning measurement and linking solutions of the future together.
 > 
-> **If you would like to join, please reach out to us today at [[email protected]](mailto:[email protected] "mailto:[email protected]") or by filling out this [form](https://forms.gle/i8Fjxhjh7oY6fDfUA).**
+> **If you would like to join, please reach out to us today at [[email protected]](mailto:[email protected] "mailto:[email protected]") or by filling out this [form](https://branch.link/sandbox?~channel=ios-repo).**
 
 Branch helps mobile apps grow with deep links / deeplinks that power paid acquisition and re-engagement campaigns, referral programs, content sharing, deep linked emails, smart banners, custom user onboarding, and more.