wiki: toggle line numbers on code blocks

Summary

The Moin wiki supports Syntax Highlighting which allows code block line numbers to be toggled on/off.

A quick search only shows it used on the Lua Examples and Dissectors.

Short term solution would be to remove the line numbers from the affected code blocks.
This makes copy/paste easier to kick the tires on the examples.
Long term, look at adding this function back to the Wiki if/when it is migrated off Gitlab.

Affected website

https://gitlab.com/wireshark/wireshark/-/wikis/Lua/Examples
https://gitlab.com/wireshark/wireshark/-/wikis/Lua/Dissectors

What is the exact issue

Source as brought into gitlab wiki:

## Using Lua to register protocols to more ports

<div class="highlight lua">

<div class="codearea" dir="ltr" lang="en">

``` 
   1 -- register http to handle ports 4888-4891
   2 do
   3         local tcp_port_table = DissectorTable.get("tcp.port")
   4         local http_dissector = tcp_port_table:get_dissector(80)
   5         for i,port in ipairs{4888,4889,4890,4891} do
   6                 tcp_port_table:add(port,http_dissector)
   7         end
   8 end
```

</div>

</div>

Relevant logs and/or screenshots

Additional information

(Further information which may help to solve this issue)

web sites