.github/workflow/lint: bump golangci-lint to v2.6.0

Author: wikkyk

.github/workflows/lint.yml

@@ -21,7 +21,7 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v8
         with:
-          version: v2.4.0
+          version: v2.6.0
           install-mode: goinstall
           args: '--timeout 10m'