Update usb_ethernet.md (#269)

Fixed bubble for the reboot command
Took out the ".r's" from usb0 line, looked like an error

pages/usb_ethernet.md

@@ -14,7 +14,7 @@ Specifically to v2. When combined with configuring a DNS server, FTP, or SMB (fo
                 host_mac: 48:6f:73:74:50:43
                 kvm_mac: 42:61:64:55:53:42
     ```
-    The `host_mac` address will be used on the server's network interface. The `kvm_mac` means the address that will be assigned to the local interface on the Pi-KVM. The KVM interface will be called `usb0`.r's network interface. If the `host_mac` or `kvm_mac` is not specified, a random value will be used. The `driver` parameter means the protocol that will be used for the USB network. The default value is `ecm` so it can be passed it this example. Other possible values are `eem`, `ncm` and `rndis`.
+    The `host_mac` address will be used on the server's network interface. The `kvm_mac` means the address that will be assigned to the local interface on the Pi-KVM. The KVM interface will be called `usb0`network interface. If the `host_mac` or `kvm_mac` is not specified, a random value will be used. The `driver` parameter means the protocol that will be used for the USB network. The default value is `ecm` so it can be passed it this example. Other possible values are `eem`, `ncm` and `rndis`.
 2. To automatically configure the USB network on the server recommended using the service `kvmd-otgnet`. It configures the firewall, assigns an address to the local Pi-KVM interface `usb0` and starts DHCP so the managed server can get the IPv4 address. By default, the address `169.254.0.1/28` to interface `usb0` will be assigned. One of the other addresses from the network `169.254.0.0./28` will be assigned to the server when it requests it via DHCP. For security reasons, all incoming connections from the server to the Pi-KVM side are blocked (except for ICMP and UDP port 67 which is used for DHCP). If you want to allow access from the server to the Pi-KVM interface, then you need to add ports 80 and 443 to the whitelist using `/etc/kvmd/override.yaml` file like this:
     ```yaml
     otgnet:
@@ -52,4 +52,4 @@ By default, `kvmd-otgnet` will configure network connection between Pi-KVM and t
             post_start_cmd_append:
             - "--dhcp-option=6,8.8.8.8"
     ```
-5. Don't forget `reboot.
+5. Don't forget ```reboot```.