feat: Bump geokrety/geokrety-nginx in version-set to v1.0.18

Author: geokrety-bot

defaults/main/versionset.yml

@@ -3,7 +3,7 @@ geokrety_cdn_image:
   docker_tag: 1.1.3
 geokrety_nginx_image:
   git_url: https://github.com/geokrety/geokrety-nginx
-  docker_tag: 1.0.15
+  docker_tag: 1.0.18
 geokrety_base_image:
   git_url: https://github.com/geokrety/geokrety-website-docker-base
   docker_tag: 1.0.15