Sign with a non test key to avoid Play Integrity custom ROM detection

[nm17]

From https://xdaforums.com/t/module-play-integrity-fix-safetynet-fix.4607985/ :

BEFORE YOU START:

• Your ROM must be signed with a private key from maintainer, you can check with this command:
  unzip -l /system/etc/security/otacerts.zip
  If it shows "testkey", you won't pass Device verdict even with valid fingerprint.

As I have checked on the latest ArrowOs 13.1 20240203, it is signed by a testkey. Please release a version signed by a something other then that testkey. Thank you in advance! ❤️

[nm17]

Forgot to tag, in case you have issues notifications turned off. @RemyL