Update React module from 3 weeks to 4 weeks

[tomdaly]

Which module(s) and week(s) does this change affect?
Module(s): React
Week(s): N/A

What is the work that needs to be done?

Update the React module from a 3 week course to a 4 week course, by moving and updating lessons in the syllabus

Why is this work important to do?

PD team update in 2021-10-13 minutes mentioned changing tech modules to 4 weeks with integrated PD sessions instead of 3 weeks and a separate PD week