Update trivy version (#202)

Author: Tim Middleton

Makefile

@@ -596,7 +596,7 @@ getcopyright: ## Download copyright jar locally if necessary.
 .PHONY: gettrivy
 gettrivy:
 	@mkdir -p $(TOOLS_BIN)
-	curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b $(TOOLS_BIN) v0.38.3
+	curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b $(TOOLS_BIN) v0.51.2
 
 # go-get-tool will 'go get' any package $2 and install it to $1.
 PROJECT_DIR := $(shell dirname $(abspath $(lastword $(MAKEFILE_LIST))))