chore(deps): update docker/build-push-action action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/build-push-action	action	major	v4 -> v6

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Release Notes

docker/build-push-action (docker/build-push-action)

v6

Compare Source

v5

Compare Source

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Configuration

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🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

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

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• If you want to rebase/retry this PR, check this box

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.28%. Comparing base (499661e) to head (4ce675f).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #694      +/-   ##
==========================================
- Coverage   86.51%   86.28%   -0.24%     
==========================================
  Files          19       19              
  Lines        1587     1604      +17     
==========================================
+ Hits         1373     1384      +11     
- Misses        173      177       +4     
- Partials       41       43       +2     

see 1 file with indirect coverage changes

Flag	Coverage Δ
unit-tests	86.28% <ø> (-0.24%)	⬇️

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