chore(deps): update module github.com/golangci/golangci-lint to v2.1.6

Author: elastic-renovate-prod[bot]

Makefile

@@ -254,7 +254,7 @@ tools: $(GOBIN) tools-golangci-lint ## Install useful tools for linting, docs ge
 
 .PHONY: tools-golangci-lint
 tools-golangci-lint: ## Download golangci-lint locally if necessary.
-	@[[ -f $(GOBIN)/golangci-lint ]] || curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) v2.1.5
+	@[[ -f $(GOBIN)/golangci-lint ]] || curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) v2.1.6
 
 
 .PHONY: misspell