docs: update API endpoint paths in documentation

docs/api.md

@@ -1575,7 +1575,7 @@ Log messages are sent as JSON objects:
 
 ## Get Settings
 
-**Endpoint:** `/settings/get`  
+**Endpoint:** `/system/settings/get`  
 **Method:** GET  
 **Auth Required:** Yes (token)  
 **Permission Level:** Superuser, Admin
@@ -1649,7 +1649,7 @@ key=ListenAddr
 
 ## Set Settings
 
-**Endpoint:** `/settings/set`  
+**Endpoint:** `/system/settings/set`  
 **Method:** POST  
 **Content-Type:** application/json  
 **Auth Required:** Yes (token)