Rename `mgmt` param in `br` naming for consistency

PROD-17599

Change-Id: I4b4d25526b5a9547a366b0cfa30cd6ab611b7c26
diff --git a/linux/network/interface/single_ovs_dvr.yml b/linux/network/interface/single_ovs_dvr.yml
index 482bd02..2f4cf2a 100644
--- a/linux/network/interface/single_ovs_dvr.yml
+++ b/linux/network/interface/single_ovs_dvr.yml
@@ -39,7 +39,7 @@
           type: ovs_port
           mtu: 65000
           bridge: br-floating
-        br-mgmt:
+        br-mgm:
           enabled: true
           type: bridge
           mtu: ${_param:interface_mtu}
@@ -64,4 +64,4 @@
           use_interfaces:
           - ${_param:external_interface}
           use_ovs_ports:
-          - float-to-ex
\ No newline at end of file
+          - float-to-ex