Fix grammar

Grammar fix on line 1008

Author: xPolydeuces

src/content/4/en/part4b.md

@@ -1005,7 +1005,7 @@ Full stack development is <i> extremely hard</i>, that is why I will use all the
 - I will use the network tab of the browser dev tools to ensure that frontend and backend are communicating as I expect
 - I will constantly keep on eye the state of the server to make sure that the data sent there by the frontend is saved there as I expect
 - I will keep an eye on the database: does the backend save data there in the right format
-- I progress with small steps
+- I will progress in small steps
 - <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</i>
 - 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
 - <i>If a test does not pass, I make sure that the tested functionality for sure works in the application</i>