fix: accordion: reverts fit content change in sass

[dkilgore-eightfold]

SUMMARY:

reverts sass change to previous by removing width: fit-content

JIRA TASK (Eightfold Employees Only):

ENG-89696

CHANGE TYPE:

• [x] Bugfix Pull Request
• [ ] Feature Pull Request

TEST COVERAGE:

• [x] Tests for this change already exist
• [ ] I have added unittests for this change

TEST PLAN:

Pull the pr branch and run yarn and yarn storybook. Verify the Accordion stories behave as expected.

[codesandbox-ci[bot]]

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