Use setup julia v2 in CI

[jishnub]

This fetches the latest version of the script, which ensures that the LTS version pointed to is updated to v1.10 instead of using v1.6

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.91%. Comparing base (41e663f) to head (ebc9c88).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #169      +/-   ##
==========================================
- Coverage   94.27%   93.91%   -0.36%     
==========================================
  Files          27       27              
  Lines        1851     1842       -9     
==========================================
- Hits         1745     1730      -15     
- Misses        106      112       +6     

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