chore(deps): update docker/build-push-action action to v6.8.0 (#2066) #1496

Job	Run time
setup-muzzle-matrix	1m 46s
shellcheck	10s
build	3m 35s
smoke-test (windows-2019, glassfish)	27m 58s
smoke-test (windows-2019, jboss)	11m 48s
smoke-test (windows-2019, jetty)	25m 38s
smoke-test (windows-2019, liberty)	33m 39s
smoke-test (windows-2019, tomcat)	27m 8s
smoke-test (windows-2019, tomee)	23m 51s
smoke-test (windows-2019, weblogic)	10m 50s
smoke-test (windows-2019, wildfly)	33m 27s
smoke-test (windows-2019, other)	14m 28s
smoke-test (ubuntu-22.04, glassfish)	9m 7s
smoke-test (ubuntu-22.04, jboss)	6m 38s
smoke-test (ubuntu-22.04, jetty)	8m 17s
smoke-test (ubuntu-22.04, liberty)	12m 3s
smoke-test (ubuntu-22.04, profiler)	9m 29s
smoke-test (ubuntu-22.04, tomcat)	7m 11s
smoke-test (ubuntu-22.04, tomee)	6m 0s
smoke-test (ubuntu-22.04, weblogic)	8m 22s
smoke-test (ubuntu-22.04, websphere)	6m 29s
smoke-test (ubuntu-22.04, wildfly)	10m 51s
smoke-test (ubuntu-22.04, other)	6m 48s
muzzle (:instrumentation:jetty)	2m 18s
muzzle (:instrumentation:khttp)	2m 7s
muzzle (:instrumentation:liberty)	2m 6s
muzzle (:instrumentation:tomcat)	2m 18s
muzzle (:instrumentation:weblogic)	2m 10s
muzzle (:instrumentation:websphere)	2m 17s
muzzle (:instrumentation:wildfly)	2m 5s
	5h 20m 54s

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