Clarify purpose and implications in README

Updated the description to clarify the site's purpose and the implications of the developer verification mandate.

Author: Hogwai

README.md

@@ -1,6 +1,6 @@
 # Keep Android Open
 
-**Keep Android Open** is a [community advocacy site](https://keepandroidopen.org) fighting Google's 2025 developer verification mandate, which ends anonymous sideloading.
+**Keep Android Open** is a [community advocacy website](https://keepandroidopen.org) fighting against Google's 2025 developer verification mandate, which will require all developers to be registered with Google.
 You can find more details [here](/index.md).
 
 ## Purpose