build: update linter

Author: leafty

.github/workflows/test.yaml

@@ -62,4 +62,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.1
+          version: v2.6

Makefile

@@ -69,6 +69,10 @@ check-format:  ## Check that sources are correctly formatted
 check-vet:  ## Check source files with `go vet`
 	go vet ./...
 
+.PHONY: lint
+lint:  ## Lint source files with `golangci-lint run`
+	golangci-lint run
+
 ##@ Code generation
 
 .PHONY: renku-users-apispec
@@ -80,8 +84,6 @@ renku-users-apispec:  ## Download the "users" API spec
 .PHONY: renku-session-apispec
 renku-session-apispec:  ## Download the "session" API spec
 	curl -L -o pkg/renkuapi/session/api.spec.yaml https://raw.githubusercontent.com/SwissDataScienceCenter/renku-data-services/refs/heads/main/components/renku_data_services/session/api.spec.yaml
-	# sed -e 's/- default: "general"//g' pkg/renkuapi/users/api.spec.yaml > pkg/renkuapi/users/api.spec.new.yaml
-	# mv pkg/renkuapi/users/api.spec.new.yaml pkg/renkuapi/users/api.spec.yaml
 
 .PHONY: generate
 generate: pkg/renkuapi/users/users_gen.go pkg/renkuapi/session/session_gen.go  ## Run go generate