Update docker/build-push-action action to v6 #62152

Job	Run time
detect changed files	10s
Changelogger use	29s
Changelogger validity	1m 4s
Copied files are in sync	9s
Project structure	2m 8s
PHP lint (7.0)	33s
PHP Code Sniffer (non-excluded files only)	0s
PHP lint (7.2)	1m 23s
PHP lint (7.4)	35s
PHP lint (8.0)	39s
PHP lint (8.1)	38s
PHP Compatibility	0s
PHP lint (8.2)	1m 10s
PHP lint (8.3)	36s
PHP Code Sniffer (changes to excluded files only)	0s
Check linter exclude lists	0s
ESLint (non-excluded files only)	0s
ESLint (changes to excluded files only)	0s
Lint GitHub Actions yaml files	34s
Lock files are up to date	0s
Monorepo package version refs	0s
	10m 8s

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