chore(deps): update github artifact actions (major)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/download-artifact	action	major	v7 → v8
actions/upload-artifact	action	major	v6 → v7

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Release Notes

actions/download-artifact (actions/download-artifact)

v8

Compare Source

actions/upload-artifact (actions/upload-artifact)

v7

Compare Source

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Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.10%. Comparing base (8b0dddf) to head (31b6632).
⚠️ Report is 1 commits behind head on 0.7.x.

Additional details and impacted files

@@           Coverage Diff           @@
##            0.7.x     #189   +/-   ##
=======================================
  Coverage   95.10%   95.10%           
=======================================
  Files          10       10           
  Lines         184      184           
=======================================
  Hits          175      175           
  Misses          9        9           

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