refactor: updated README file to reflect template changes

[Mashal-m]

Description

The README of the MFEs needs to be updated because the frontend app template has been updated.

Issue related: openedx/wg-frontend#169

[codecov]

Codecov Report

Attention: 65 lines in your changes are missing coverage. Please review.

Comparison is base (d36b78a) 84.87% compared to head (33cce3f) 85.13%.
Report is 72 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #860      +/-   ##
==========================================
+ Coverage   84.87%   85.13%   +0.26%     
==========================================
  Files         320      325       +5     
  Lines        6399     6728     +329     
  Branches     1552     1633      +81     
==========================================
+ Hits         5431     5728     +297     
- Misses        941      969      +28     
- Partials       27       31       +4     

Files	Coverage Δ
src/components/contact-admin-mailto/index.jsx	100.00% <100.00%> (ø)
src/components/course/CourseContextProvider.jsx	100.00% <100.00%> (ø)
src/components/course/CourseMainContent.jsx	100.00% <ø> (ø)
src/components/course/CoursePage.jsx	93.75% <100.00%> (ø)
src/components/course/CourseRecommendationCard.jsx	96.00% <100.00%> (+0.16%)	⬆️
src/components/course/CourseSidebar.jsx	100.00% <100.00%> (ø)
src/components/course/CourseSidebarListItem.jsx	100.00% <ø> (ø)
src/components/course/EnrollModal.jsx	93.54% <100.00%> (ø)
src/components/course/VerifiedCertPitch.jsx	100.00% <ø> (ø)
...c/components/course/course-header/CourseHeader.jsx	100.00% <100.00%> (ø)
... and 112 more

... and 3 files with indirect coverage changes

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