feat: mark course about page static strings for i18n

[jajjibhai008]

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 84.64%. Comparing base (d36b78a) to head (5332058).
Report is 169 commits behind head on master.

Files	Patch %	Lines
.../course/course-header/deprecated/CourseRunCard.jsx	83.33%	2 Missing ⚠️
src/components/course/CourseSkills.jsx	0.00%	1 Missing ⚠️
...c/components/course/course-header/CourseHeader.jsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #991      +/-   ##
==========================================
- Coverage   84.87%   84.64%   -0.23%     
==========================================
  Files         320      342      +22     
  Lines        6399     7490    +1091     
  Branches     1552     1844     +292     
==========================================
+ Hits         5431     6340     +909     
- Misses        941     1112     +171     
- Partials       27       38      +11     

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[muhammad-ammar]

Great Work. Left some minor comments to regarding updating the descriptions to add more context and some refactoring.