fix typos in completion message

Author: Shotgunosine

main.py

@@ -229,9 +229,9 @@
                              message=exp.task_data_upload.result['content'])
 
         Label(text='Thank you for completing the tasks! Please return to the website'
-                   'and click the "I have completed the tasks" button.'
-                   '\n\n If you know longer have the page open, click on the task link'
-                   ' from prolific again to return to the webpage.'
+                   ' and click the "I have completed the tasks" button.'
+                   '\n\n If you no longer have the page open, click on the task link'
+                   ' from Prolific again to return to the webpage.'
                    '\n\n You wil be redirected to Prolific with your completion code.',
               text_size=(s(700), None), font_size=s(CogBatt_config.SSI_FONT_SIZE))
         with UntilDone():