fix: remove unnecessary encoding from screenshot response data

Author: thalissonvs

pydoll/browser/page.py

@@ -256,7 +256,7 @@ async def get_screenshot_base64(self):
         # TODO: remove the duplicated logic
         """
         response = await self._execute_command(PageCommands.screenshot())
-        return response['result']['data'].encode('utf-8')
+        return response['result']['data']
 
     async def set_download_path(self, path: str):
         """