Adding DHCP:flase to static IP snippet

Author: rohennes

modules/virt-example-nmstate-IP-management.adoc

@@ -25,6 +25,7 @@ The following snippet statically configures an IP address on the Ethernet interf
       type: ethernet
       state: up
       ipv4:
+        dhcp: false
         address:
         - ip: 192.168.122.250 <1>
           prefix-length: 24
@@ -132,6 +133,7 @@ The following snippet configures a static route and a static IP on interface `et
       type: ethernet
       state: up
       ipv4:
+        dhcp: false
         address:
         - ip: 192.0.2.251 <1>
           prefix-length: 24