Documented kzg-trusted-setup CLI option

docs/public-networks/reference/cli/options.md

@@ -1167,6 +1167,40 @@ The key-value storage to use. Use this option only if using a storage system pro
 
 For development use only, the `memory` option provides ephemeral storage for sync testing and debugging.
 
+### `kzg-trusted-setup`
+
+<!--tabs-->
+
+# Syntax
+
+```bash
+--kzg-trusted-setup=<LEVEL>
+```
+
+# Example
+
+```bash
+--kzg-trusted-setup=DEBUG
+```
+
+# Environment variable
+
+```bash
+BESU_KZG_TRUSTED_SETUP=DEBUG
+```
+
+# Configuration file
+
+```bash
+kzg-trusted-setup="DEBUG"
+```
+
+<!--/tabs-->
+
+Use the `--kzg-trusted-setup` CLI option to pass a custom setup file for custom networks or to
+override the default setup file for named networks.
+
+
 ### `logging`
 
 <!--tabs-->