fix save screenshot issue (#99)

Co-authored-by: Alvaro Laserna <alvarolaserna@MacBook-Pro-2.local>

Author: alvarolaserna

testui/support/appium_driver.py

@@ -269,7 +269,7 @@ def set_screenshot_path(self, screenshot_path: str):
 
     def set_save_screenshot_on_fail(self, save_screenshot_on_fail: bool):
         """Set save screenshot on fail"""
-        self.__configuration.save_full_stacktrace = save_screenshot_on_fail
+        self.__configuration.save_screenshot_on_fail = save_screenshot_on_fail
         return self
 
     def set_save_full_stacktrace(self, save_full_stacktrace: bool):