Update Node.js to v21 #194

Job	Run time
trade-processor-dockerfile-scan	1m 42s
people-service-dotnet-scan	46s
database-dockerfile-scan	1m 29s
account-service-dockerfile-scan	1m 55s
trade-feed-dockerfile-scan	1m 36s
account-service-gradle-scan	1m 13s
reference-data-node-scan	50s
database-gradle-scan	43s
position-service-dockerfile-scan	1m 43s
trade-feed-node-scan	28s
position-service-gradle-scan	58s
trade-service-dockerfile-scan	1m 51s
web-front-end/angular-node-scan	58s
trade-processor-gradle-scan	1m 7s
web-front-end/angular-dockerfile-scan	2m 39s
web-front-end/proxy-node-scan	38s
trade-service-gradle-scan	1m 17s
people-service-dockerfile-scan	1m 40s
web-front-end/react-node-scan	1m 29s
reference-data-dockerfile-scan	2m 35s
	27m 37s

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