dissect-wireshark: Add support for dissecting of Ethernet frames (ethertype=0x8624)

Change-Id: I1cc8898076bd3f4d615045514907095c6a5f9149
Refs: #3092
diff --git a/tools/dissect-wireshark/README.md b/tools/dissect-wireshark/README.md
index 6284650..02497c7 100644
--- a/tools/dissect-wireshark/README.md
+++ b/tools/dissect-wireshark/README.md
@@ -15,6 +15,8 @@
 - NDN packets are encapsulated in IPv4/IPv6 TCP/HTTP WebSocket packets with source or
   destination port 9696.
 
+- NDN packets are encapsulated in Ethernet frames with EtherType 0x8624.
+
 ## Available dissection features
 
 - When UDP packet is fragmented, the dissection is performed after the full IP reassembly.