review by gsanchietti

Co-authored-by: Giacomo Sanchietti <giacomo.sanchietti@nethesis.it>

Author: andre8244

docs/administrator-manual/advanced/nethvoice_proxy.md

@@ -73,7 +73,7 @@ In this scenario:
 
 NethVoice proxy is installed as part of the NethVoice module setup wizard. See [NethVoice Installation](../install/nethvoice_install.md) for the complete installation sequence.
 
-### Manual Installation (not recommended):
+### Manual Installation (not recommended)
 
 :::note
 You can install only one NethVoice Proxy per node from the Software Center.