Update xm157-framework.md

Author: PabstMirror

docs/wiki/framework/xm157-framework.md

@@ -14,6 +14,7 @@ version:
 
 ## 1. Config Values
 
+### 1.1 Scope config
 
 ```cpp
 class CfgWeapons {
@@ -52,4 +53,15 @@ class CfgWeapons {
         };
     };
 };
+
+```
+### 1.2 Ammo Config
+Shells can be set to airburst based on lased distance
+
+```cpp
+class myAmmo: G_40mm_HE {
+    class Eventhandlers {
+        fired = QUOTE(call ace_xm157_fnc_airburst_ammoFired);
+    };
+};
 ```