Update nginx Docker tag to v1.25.3

roles/custom/matrix-nginx-proxy/defaults/main.yml

@@ -2,7 +2,7 @@
 # Project source code URL: https://github.com/nginx/nginx
 matrix_nginx_proxy_enabled: true
 # renovate: datasource=docker depName=nginx
-matrix_nginx_proxy_version: 1.25.2-alpine
+matrix_nginx_proxy_version: 1.25.3-alpine
 
 # We use an official nginx image, which we fix-up to run unprivileged.
 # An alternative would be an `nginxinc/nginx-unprivileged` image, but