Add missing parameter hint to 'select' command

The 'select' command requires exactly one parameter, but the parameter
hint was previously missing, potentially causing confusion. Referenced
the existing parameter hint from the 'log' command to improve clarity
and consistency in usage documentation.

Change-Id: I16d81a3041ea495dcc0a4272ba1a1c4388f4d017

Author: Dennis40816

console.c

@@ -427,7 +427,7 @@ void init_cmd()
                 "Display or set options. See 'Options' section for details",
                 "[name val]");
     ADD_COMMAND(quit, "Exit program", "");
-    ADD_COMMAND(source, "Read commands from source file", "");
+    ADD_COMMAND(source, "Read commands from source file", "file");
     ADD_COMMAND(log, "Copy output to file", "file");
     ADD_COMMAND(time, "Time command execution", "cmd arg ...");
     ADD_COMMAND(web, "Read commands from builtin web server", "[port]");