Fix cluster schematic in network graph

main.typ

@@ -66,32 +66,38 @@
   start: placeholder("01.01.1970"),
   end: placeholder("31.12.1970"),
   setup: placeholder([Connection to #targetFull was made through a dedicated VPN connection. The inner IP address of the test device was 10.0.0.42.]),
-  nodes: "
-    subgraph stage1 {
-      label=\"Connection\";
-      User -> Firewall [label=\"OpenVPN\"];
-    }
+  nodes: ```
+    digraph G {
+      rankdir=LR;
+      node [shape=rectangle];
+      color="#3C6A6A";
 
-    subgraph targetnet1 {
-      label=\"Target Network\";
-      Firewall -> Target1;
-      Firewall -> Target2;
-      Firewall -> Target3;
-      Firewall -> Target4;
-    }
+      subgraph cluster_conn {
+        label="Connection"
+        User -> Firewall [label="OpenVPN"]
+      }
 
-    subgraph targetnet2 {
-      label=\"Target Network\";
-      Target2 -> Target5;
-      Target2 -> Target6;
-      Target2 -> Target7;
-    }
+      subgraph cluster_targetnet1 {
+        label="DMZ";
+        Firewall -> Target1
+        Firewall -> Target2
+        Firewall -> Target3
+        Firewall -> Target4
+      }
 
-    subgraph targetnet3 {
-      label=\"Target Network\";
-      Target4 -> Target8;
+      subgraph cluster_targetnet2 {
+        label="Mgmt LAN"
+        Target2 -> Target5
+        Target2 -> Target6
+        Target2 -> Target7
+      }
+
+      subgraph cluster_targetnet3 {
+        label="IoT Devices"
+        Target4 -> Target8
+      }
     }
-  ",
+  ```,
   scope: (
       ( type: "Address", content: placeholder("10.23.42.1"), inScope: true ),
       ( type: "Address", content: placeholder("2001:db8::2342"), inScope: true ),