res_pjsip_notify: Fix CLI usage info

The usage info for 'pjsip send notify' previously referenced the
chan_sip configuration sip_notify.conf.  Fix this to reference
the correct configuration pjsip_notify.conf.

ASTERISK-25590 #close

Change-Id: I3898271a8e8a8b1db201741e790ebe2c6bf5cdea

res/res_pjsip_notify.c

@@ -840,7 +840,7 @@ static char *cli_notify(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a
 		e->usage =
 			"Usage: pjsip send notify <type> {endpoint|uri} <peer> [<peer>...]\n"
 			"       Send a NOTIFY request to an endpoint\n"
-			"       Message types are defined in sip_notify.conf\n";
+			"       Message types are defined in pjsip_notify.conf\n";
 		return NULL;
 	case CLI_GENERATE:
 		if (a->argc > 4 && (!strcasecmp(a->argv[4], "uri"))) {