Bump aquasecurity/trivy-action from 0.19.0 to 0.21.0 #112

Job	Run time
Check whether tests need to be run based on diff	16s
Build Flow Aggregator image to be used for Kind e2e tests	3m 0s
Build Antrea image to be used for Kind e2e tests	11m 18s
E2e tests on a Kind cluster on Linux	47m 53s
E2e tests on a Kind cluster on Linux with non default values (proxyAll=true, LoadBalancerMode=DSR...	50m 2s
E2e tests on a Kind cluster on Linux with all features enabled	59m 37s
API compatible with client version N-1	8m 57s
E2e tests on a Kind cluster on Linux for Flow Visibility	28m 32s
E2e tests on a Kind cluster on Linux (hybrid)	39m 18s
E2e tests on a Kind cluster on Linux (noEncap)	38m 22s
NetworkPolicy conformance tests on a Kind cluster on Linux	8m 0s
Antrea-native (VLAN) secondary network tests on a Kind cluster on Linux	3m 24s
Upgrade from Antrea version N-1	9m 29s
Upgrade from Antrea version N-2	8m 48s
API compatible with client version N-2	8m 34s
Validate metrics in Prometheus document match running deployment's	2m 17s
Delete uploaded images	3s
	5h 27m 50s

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