Update gradle/actions digest to bc78598 #15605

Job	Run time
backend-build	49s
audit-licenses-backend	34s
audit-licenses-frontend	25s
backend-build-image-and-scan	2m 23s
frontend-build-image-and-scan	2m 38s
generate-backend-code-documentation	1m 27s
generate-entity-relationship-diagram	0s
prep-playwright-tests	0s
backend-checks / scan-backend-changes	6s
frontend-checks / scan-frontend-changes	3s
frontend-checks / frontend-tests	0s
frontend-checks / analyze-frontend	0s
frontend-checks / frontend-style	0s
backend-checks / analyze-backend	0s
backend-checks / backend-integration-tests	0s
backend-checks / backend-unit-tests	0s
push-backend-image-to-registry	0s
push-frontend-image-to-registry	0s
deploy-staging	0s
e2e-tests	0s
generate-test-reports	0s
query-performance-tests	0s
check-latest-deploy-tag	0s
push-reports	0s
deploy-production	0s
deploy-uat	0s
	8m 25s

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