fix(deps): update dependency koa to v2.15.4 [security] #2561

Job	Run time
prerequisite	53s
version-generator	8s
docker-build (linux/amd64, amd64, auth)	1m 19s
docker-build (linux/amd64, amd64, backend)	1m 23s
docker-build (linux/amd64, amd64, frontend)	1m 32s
docker-build (linux/arm64, arm64, auth)	4m 34s
docker-build (linux/arm64, arm64, backend)	5m 39s
docker-build (linux/arm64, arm64, frontend)	4m 13s
auth	1m 37s
backend	5m 17s
frontend	33s
codeql-analyze (javascript, ./.github/codeql/source.yml)	2m 25s
graphql (auth)	3m 2s
codeql-analyze (javascript, ./.github/codeql/tests.yml)	1m 45s
integration-test	2m 31s
mock-account-servicing-entity	38s
graphql (backend)	3m 2s
token-introspection	40s
Docker Grype Scan (linux/amd64, amd64, auth)	21s
Docker Trivy Scan (linux/amd64, amd64, auth)	9s
Docker Grype Scan (linux/amd64, amd64, backend)	16s
Docker Grype Scan (linux/amd64, amd64, frontend)	16s
Docker Trivy Scan (linux/amd64, amd64, backend)	11s
Docker Grype Scan (linux/arm64, arm64, auth)	15s
Docker Trivy Scan (linux/amd64, amd64, frontend)	14s
Docker Trivy Scan (linux/arm64, arm64, auth)	10s
Docker Grype Scan (linux/arm64, arm64, backend)	20s
Docker Trivy Scan (linux/arm64, arm64, backend)	14s
Docker Trivy Scan (linux/arm64, arm64, frontend)	14s
Docker Grype Scan (linux/arm64, arm64, frontend)	21s
node-build	33s
Push to registry	0s
Push multi-arch manifest list	0s
generate-release	0s
	44m 45s

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