Bump cross-spawn in steps fixture

[szdziedzic]

Why

Resolve https://github.com/expo/eas-cli/security/dependabot/228 by updating the vulnerable cross-spawn transitive dependency in the my-custom-ts-function steps fixture lockfile.

How

Updated the Yarn v1 fixture lockfile entry for cross-spawn@^7.0.3 from 7.0.3 to 7.0.6.

Added a changelog entry for the fixture dependency bump.

Test Plan

• corepack yarn fmt
• corepack yarn lint-changelog
• git diff --check

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.67%. Comparing base (c944298) to head (ff096cf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3977   +/-   ##
=======================================
  Coverage   59.67%   59.67%           
=======================================
  Files         941      941           
  Lines       41319    41319           
  Branches     8675     8675           
=======================================
  Hits        24654    24654           
  Misses      16571    16571           
  Partials       94       94           

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[github-actions]

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[github-actions]

✅ Thank you for adding the changelog entry!