fix: uv cache dir

[dan-fernandes]

Fixes #1308

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.76%. Comparing base (ca0b14b) to head (fb77439).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1322   +/-   ##
=======================================
  Coverage   94.76%   94.76%           
=======================================
  Files          42       42           
  Lines        2752     2752           
=======================================
  Hits         2608     2608           
  Misses        144      144           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[abbiemery]

Spoke in person. I think this a better angle than changing the security context. I appreciate it has been difficult to test as it's a flaky error beyond our ability reliably reproduce.