Helm: correction in the value of multus template

Signed-off-by: ismail <mohammed.ismail@openairinterface.org>

charts/oai-smf/templates/multus.yaml

@@ -14,7 +14,7 @@ spec:
         "addresses": [
                 {
                         "address": {{- cat .Values.multus.n4IPadd "/" .Values.multus.n4Netmask | nospace | quote }},
-                        "gateway": {{- cat .Values.config.n4Gw | nospace | quote }}
+                        "gateway": {{- cat .Values.multus.n4Gw | nospace | quote }}
                 }
         ]
       }