Bug#1107187: trixie: document interface naming changes for i40e with 6.12 kernel

My $0.02:

The interface names must not change, esp. since the "new" names are
supposed to be predictable, see https://systemd.io/PREDICTABLE_INTERFACE_NAMES/
It says

```
With this new scheme you now get:
	:
	Stable interface names when kernels or drivers are updated/changed
	:
	The interface names are fully predictable, i.e. just by looking at
	lspci you can figure out what the interface is going to be called
	:
```


Regards
Harri