Fixed an overly enthousiastic search and replace

Repaired the link to TCPextend, which I used as base for this Lua script

Author: syn-bit

Diff for: TLSextend.lua

@@ -22,7 +22,7 @@
 -- Version  1.0
 -- Source   https://github.com/syn-bit/TLSextend
 --
--- Generated from: https://github.com/gaddman/wireshark-TLSextend
+-- Generated from: https://github.com/gaddman/wireshark-TCPextend
 
 -- declare some fields to be read
 local f_tcp_stream              = Field.new("tcp.stream")