📌 Pin Click to latest version that does not break tests

[teroyks]

Click v8.2 introduces some changes that break tests, especially where git operations are monkeypatched: it produces the following extra warning output:

Warning: The directory is not a Git repository. 
Would you like to just run using the latest commit known by Valohai?
Use latest commit? [Y/n]:Aborted!

Naturally, this breaks the tests that check the output for expected test.

Temporarily fixed by pinning click to a version below 8.2.

---

Also update setup-uv to v6 while at it (unrelated, but left there since it was already there due to earlier testing).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.18%. Comparing base (ea1d7fa) to head (6c0cec9).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #336   +/-   ##
=======================================
  Coverage   86.18%   86.18%           
=======================================
  Files         129      129           
  Lines        4676     4676           
  Branches      605      605           
=======================================
  Hits         4030     4030           
  Misses        452      452           
  Partials      194      194           

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[akx]

Put a pin in it for now!

[akx]

(See pallets/click#2522 in Click.)