chore(deps): bump docker/setup-buildx-action from 3 to 4 #221

Job	Run time
Build and push PHP 8.0	4m 32s
Build and push PHP 8.4	6m 23s
Build and push PHP 7.4	3m 59s
Build and push PHP 8.1	5m 1s
Build and push PHP 8.2	5m 11s
Build and push PHP 8.3	5m 15s
Build and push PHP 8.5	5m 7s
Build and push redis	28s
Build and push mariadb	30s
Build and push cron	19s
Build and push nginx-proxy	27s
Build and push postfix	24s
Build and push newrelic-daemon	21s
Build and push nginx	29s
Build and push mailhog	19s
	38m 45s

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