Update part5b.md

Grammar correction

Author: Sam Vitare

src/content/5/en/part5b.md

@@ -502,7 +502,7 @@ Full stack development is <i> extremely hard</i>, that is why I will use all the
 - <i>when I suspect that there is a bug in the frontend, I make sure that the backend works for sure</i>
 - <i>when I suspect that there is a bug in the backend, I make sure that the frontend works for sure</i>
 - I will write lots of _console.log_ statements to make sure I understand how the code and the tests behave and to help pinpoint problems
-- If my code does not work, I will not write more code. Instead, I start deleting the code until it works or just return to a state when everything still was still working
+- If my code does not work, I will not write more code. Instead, I start deleting the code until it works or just return to a state when everything was still working
 - If a test does not pass, I make sure that the tested functionality for sure works in the application
 - When I ask for help in the course Discord or Telegram channel or elsewhere I formulate my questions properly, see [here](https://fullstackopen.com/en/part0/general_info#how-to-get-help-in-discord-telegram) how to ask for help