[renovate] Update golangci/golangci-lint Docker tag to v1.64.6

See merge request danet/gosdn!1241

Co-authored-by: Renovate Bot <renovate@danet.fbi.h-da.de>

.gitlab/ci/.code-quality-ci.yml

 code-quality:
-    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/golangci/golangci-lint:v1.64.5-alpine
+    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/golangci/golangci-lint:v1.64.6-alpine
     stage: analyze
     script:
         # writes golangci-lint output to gl-code-quality-report.json