upgrade cachix/install-nix-action to v12

[kqdeng]

Signed-off-by: Kelly Deng [email protected]

Description

Bumps cachix/install-nix-action from v10 to v12 (latest version)

Why is this needed

Github actions deprecated the add-path command and install-nix-action v10 indirectly used that command, which fails the action. Upgrading to v12 fixes that issue.

Fixes: #

How Has This Been Tested?

All checks now pass

How are existing users impacted? What migration steps/scripts do we need?

N/A

Checklist:

I have:

• updated the documentation and/or roadmap (if required)
• added unit or e2e tests
• provided instructions on how to upgrade

[codecov]

Codecov Report

Merging #370 (186ed99) into master (5cbbeec) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #370   +/-   ##
=======================================
  Coverage   24.74%   24.74%           
=======================================
  Files          14       14           
  Lines        1277     1277           
=======================================
  Hits          316      316           
  Misses        940      940           
  Partials       21       21           

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[gianarb]

Thanks!!