fix list image

Author: Michał Gryczka

src/content/blog/top_3_reasons_to_replace_openvpn_access_server.mdx

@@ -4,7 +4,7 @@ seoTitle: "Top 3 reasons to replace OpenVPN Access Server with Defguard VPN/ZTNA
 description: "OpenVPN Access Server alternative - Compare Defguard, modern WireGuard based enterprise VPN"
 author: "Michał Gryczka"
 publishDate: 2026-03-10
-image: ""
+image: "/images/blog/openvpn_vs_defguard_top_3/replace_openvpn_with_defguard.png"
 tags: ["ssl vpn", "OpenVPN", "OpenVPN Access Server", "wireguard", "comparison", "enterprise vpn"]
 ---