Mention email change in README

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CHANGELOG

@@ -24,6 +24,7 @@ v 7.1.0
   - Increased default git max_size value from 5MB to 20MB in gitlab.yml. Please update your configs!
   - Show error message in case of timeout in satellite when create MR
   - Show first 100 files for huge diff instead of hiding all
+  - Change default admin email from admin@local.host to admin@example.com
 
 v 7.0.0
   - The CPU no longer overheats when you hold down the spacebar