Update ModReg schedule for AY2021 Sem1

[chrisgzf]

Context

Data from http://www.nus.edu.sg/ModReg/docs/UGCPE_ModRegSchedule.pdf and http://www.nus.edu.sg/ModReg/docs/GD_ModRegSchedule.pdf, correct as at 19 July 2020 5pm.

Sample Screenshot (date set to 22 July 5pm):

Implementation

• Edit some dates

[codecov]

Codecov Report

Merging #2764 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2764   +/-   ##
=======================================
  Coverage   46.25%   46.25%           
=======================================
  Files         251      251           
  Lines        5310     5310           
  Branches     1225     1225           
=======================================
  Hits         2456     2456           
  Misses       2854     2854           

Impacted Files	Coverage Δ
website/src/config/index.ts	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3b59a13...b08eb0f. Read the comment docs.

[nusmods-deploy-bot]

Deployment preview for b08eb0f4 ready at http://5f14a7b1c0d617d10ffb09bc--nusmods-deploy-preview.netlify.app