docs(date): update stories to csf3 for Training Date Form 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[bot]]

Codecov Report

Merging #1347 (a400463) into master (4c31aeb) will decrease coverage by 1.15%. Report is 4 commits behind head on master. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1347      +/-   ##
==========================================
- Coverage   92.81%   91.66%   -1.15%     
==========================================
  Files          29        8      -21     
  Lines        1169      276     -893     
  Branches      355       94     -261     
==========================================
- Hits         1085      253     -832     
+ Misses         84       23      -61     

see 37 files with indirect coverage changes