Fix lint: upgrade to support go1.22

golangci-lint supports go1.22 since v1.56.0, per golangci/golangci-lint#4273.

Author: jkh52

Makefile

@@ -33,7 +33,7 @@ endif
 GOOS ?= $(shell go env GOOS)
 GOARCH ?= $(shell go env GOARCH)
 INSTALL_LOCATION:=$(shell go env GOPATH)/bin
-GOLANGCI_LINT_VERSION ?= 1.54.0
+GOLANGCI_LINT_VERSION ?= 1.56.2
 GOSEC_VERSION ?= 2.13.1
 
 REGISTRY ?= gcr.io/$(shell gcloud config get-value project)