Update system_requirements.rst

Signed-off-by: Alper Öztürk <67455295+alperozturk96@users.noreply.github.com>

Author: alperozturk96

admin_manual/installation/system_requirements.rst

@@ -116,7 +116,7 @@ Files App
 ^^^^^^^^^
 
 - **iOS** 15.0+
-- **Android** 7.0+
+- **Android** 8.0+
 
 Talk App
 ^^^^^^^^