[MOB-9117] Fix typo in Instabug.setPrimaryColor

Description of the change

Fixes a typo in color parameter causing the API not to work
Type of change
[x] Bug fix (non-breaking change that fixes an issue)
[ ] New feature (non-breaking change that adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
Related issues

Issue links go here

Checklists

Development
[ ] Lint rules pass locally
[ ] The code changed/added as part of this pull request has been covered with tests
Code review
[x] This pull request has a descriptive title and information useful to a reviewer
[x] Issue from task tracker has a link to this pull request