Bump prost from 0.12.4 to 0.13.4 in /cmd/oci-catalog #5450

Job	Run time
CI / setup	2s
CI / Build E2E runner image	1m 0s
CI / Build dashboard image	5m 48s
CI / Build apprepository-controller image	2m 11s
CI / sync_chart_from_bitnami	0s
CI / Build asset-syncer image	1m 46s
CI / test_chart_render	25s
CI / Build kubeapps-apis image	3m 42s
CI / test_dashboard	2m 59s
CI / Build pinniped-proxy image	2m 19s
CI / test_go	2m 55s
CI / test_oci_catalog	1m 8s
CI / Build oci-catalog image	1m 53s
CI / test_pinniped_proxy	1m 26s
CI / linters / golang-linter	2m 49s
CI / linters / license-headers-linter	45s
CI / linters / yaml-linter	7s
CI / linters_result	1s
CI / local_e2e_tests	0s
CI / gke_setup	0s
CI / push_dev_images	0s
CI / local_e2e_tests_result	2s
CI / GKE_REGULAR_VERSION	0s
CI / GKE_STABLE_VERSION	0s
CI / push_images	0s
CI / sync_chart_to_bitnami	0s
CI / release	0s
	31m 18s

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