sdocs(training-link): update stories to csf3 for Training Link component

[ncruz-av]

Before submitting a pull request, please make sure the following is done:

1. Fork the repository and create your branch from master.
2. Run yarn in the repository root.
3. If you've fixed a bug or added code that should be tested, add tests!
4. Ensure the test suite passes (yarn test). Tip: yarn test --watch TestName is helpful in development.
5. Make sure your code passed the conventional commits check. Read more about conventional commits

[codecov]

Codecov Report

Merging #1338 (2025f8b) into master (6bd8ed7) will decrease coverage by 1.18%.
Report is 2 commits behind head on master.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1338      +/-   ##
==========================================
- Coverage   94.50%   93.33%   -1.18%     
==========================================
  Files          26        3      -23     
  Lines         856       60     -796     
  Branches      293       27     -266     
==========================================
- Hits          809       56     -753     
+ Misses         47        4      -43     

see 23 files with indirect coverage changes