fix: updated course card resume button variant

[mahamakifdar19]

Jira Ticket: https://2u-internal.atlassian.net/browse/ENT-7843
Description: Changed course card resume/start button variant from "primary" to "outline-primary" so that its not overridden by theme colors.

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: 78 lines in your changes are missing coverage. Please review.

Comparison is base (d36b78a) 84.87% compared to head (bd4aa14) 85.13%.
Report is 78 commits behind head on master.

Files	Patch %	Lines
src/components/course/data/hooks.jsx	87.93%	7 Missing ⚠️
src/components/my-career/VisualizeCareer.jsx	74.07%	6 Missing and 1 partial ⚠️
src/components/my-career/data/service.js	56.25%	7 Missing ⚠️
src/components/course/data/utils.jsx	95.89%	6 Missing ⚠️
src/components/my-career/AddJobRole.jsx	60.00%	5 Missing and 1 partial ⚠️
src/components/my-career/data/hooks.jsx	50.00%	6 Missing ⚠️
...components/enterprise-user-subsidy/data/service.js	0.00%	5 Missing ⚠️
...n-content/course-enrollments/CourseEnrollments.jsx	82.60%	4 Missing ⚠️
src/components/my-career/SearchJobRole.jsx	91.48%	4 Missing ⚠️
...ourse-header/data/hooks/useCourseRunCardAction.jsx	50.00%	3 Missing ⚠️
... and 16 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #870      +/-   ##
==========================================
+ Coverage   84.87%   85.13%   +0.25%     
==========================================
  Files         320      325       +5     
  Lines        6399     6793     +394     
  Branches     1552     1652     +100     
==========================================
+ Hits         5431     5783     +352     
- Misses        941      979      +38     
- Partials       27       31       +4     

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