chore(deps): update docker/setup-buildx-action action to v3.12.0 #3090

Job	Run time
get-commit-message	6s
lint / lint	1m 40s
test / generate-matrix	2s
audit / audit	1m 13s
codeql / Analyze (actions)	1m 2s
codeql / Analyze (python)	1m 15s
test / test (macos-15-intel, true)	35m 35s
test / test (macos-latest, true)	31m 3s
test / test (ubuntu-24.04-arm, true)	23m 13s
test / test (ubuntu-latest, false)	24m 5s
test / test (windows-latest, true)	31m 44s
ketryx_report_and_check / ketryx_report_and_check	49s
package_publish	0s
docker_publish	0s
	2h 31m 47s

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