Update cosign installer version

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.84%. Comparing base (f67c82c) to head (82c8f69).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #94 +/- ## ======================================= Coverage 99.84% 99.84% ======================================= Files 11 11 Lines 657 657 ======================================= Hits 656 656 Misses 1 1 ```

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