fix: Dasherize conversion event types path

[zachaysan]

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Changes

Fixes https://github.com/Flagsmith/flagsmith-split-testing/issues/7

I accidentally used underscores when I first wrote this code. This is a simple fix.

How did you test this code?

N/A

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Name	Status	Preview	Comments	Updated (UTC)
docs	🛑 Canceled (Inspect)			Mar 1, 2024 4:30pm
flagsmith-frontend-preview	🛑 Canceled (Inspect)			Mar 1, 2024 4:30pm
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 1, 2024 4:30pm

[github-actions]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.86%. Comparing base (90e10cf) to head (b7ed4a5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3516   +/-   ##
=======================================
  Coverage   95.86%   95.86%           
=======================================
  Files        1097     1097           
  Lines       34140    34140           
=======================================
  Hits        32727    32727           
  Misses       1413     1413           

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[novakzaballa]

LGTM. Just needed to re-run a flaky test. Please ensure all tests have passed before requesting a review.