chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	pin	v6 → v6
docker/build-push-action	action	pin	v6 → v6
docker/login-action	action	pin	v3 → v3
docker/setup-buildx-action	action	pin	v3 → v3
eclipse-temurin	stage	pinDigest	→ 1bda4d9
mr-smithers-excellent/docker-build-push	action	pin	v6 → v6
ubuntu	final	pinDigest	→ c4a8d55

Add the preset :preserveSemverRanges to your config if you don't want to pin your dependencies.

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