docs: fixing storybook for file upload component

[AndrewClarke05]

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 #1341 (45730d5) into master (973ca28) will decrease coverage by 8.74%. Report is 1 commits behind head on master. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1341      +/-   ##
==========================================
- Coverage   92.85%   84.12%   -8.74%     
==========================================
  Files          22        8      -14     
  Lines         504      296     -208     
  Branches      166       67      -99     
==========================================
- Hits          468      249     -219     
- Misses         36       47      +11     

see 30 files with indirect coverage changes