Bump docker/build-push-action from 6.9.0 to 6.10.0 #98

Job	Run time
shellcheck	9s
Run tests (gantry_cleanup_images_spec.sh)	2m 9s
Run tests (gantry_common_options_spec.sh)	1m 52s
Run tests (gantry_filters_spec.sh)	2m 18s
Run tests (gantry_login_negative_spec.sh)	2m 23s
Run tests (gantry_login_spec.sh)	1m 59s
Run tests (gantry_manifest_spec.sh)	2m 30s
Run tests (gantry_notify_spec.sh)	2m 36s
Run tests (gantry_parallel_spec.sh)	2m 24s
Run tests (gantry_rollback_spec.sh)	2m 13s
Run tests (gantry_service_multiple_spec.sh)	1m 40s
Run tests (gantry_service_no_running_tasks_spec.sh)	1m 37s
Run tests (gantry_service_single_spec.sh)	1m 25s
Run tests (gantry_update_options_spec.sh)	2m 17s
	27m 32s

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