[deps] Bump nginx from 1.29.3-alpine to 1.29.4-alpine in /images/openwisp_nginx#540

nemesifier merged 1 commit intomasteropenwisp/docker-openwisp:masterfrom

dependabot/docker/images/openwisp_nginx/nginx-1.29.4-alpineopenwisp/docker-openwisp:dependabot/docker/images/openwisp_nginx/nginx-1.29.4-alpineCopy head branch name to clipboard