docs: Update FAQ.md - Recomendation adjustment (#7025)

This doc still says the Pi 2 is an option for Klipper, in this day and age, i am not sure it is. From anecdotal evidence, the lowest pi recommended should be the zero2w. I also changed the wording and removed some Octoprint wording in that section to better reflect how things are today, as i don't think even with virtual_sdcard these older devices will keep up.

Signed-off-by: James Hartley <james@hartleyns.com>
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@ -98,17 +98,16 @@ bootloaders.
## Can I run Klipper on something other than a Raspberry Pi 3?
The recommended hardware is a Raspberry Pi 2, Raspberry Pi 3, or
Raspberry Pi 4.
The recommended hardware is a Raspberry Pi Zero2w, Raspberry Pi 3,
Raspberry Pi 4 or Raspberry Pi 5. Klipper will also run on other SBC
devices as well as x86 hardware, as described below.
Klipper will run on a Raspberry Pi 1 and on the Raspberry Pi Zero, but
these boards don't have enough processing power to run OctoPrint
Klipper will run on a Raspberry Pi 1, 2 and on the Raspberry Pi Zero1,
but these boards don't have enough processing power to run Klipper
well. It is common for print stalls to occur on these slower machines
when printing directly from OctoPrint. (The printer may move faster
than OctoPrint can send movement commands.) If you wish to run on one
one of these slower boards anyway, consider using the "virtual_sdcard"
feature when printing (see
[config reference](Config_Reference.md#virtual_sdcard) for details).
when printing (The printer may move faster than Klipper can send
movement commands.) It is not reccomended to run Kliper on these older
machines.
For running on the Beaglebone, see the
[Beaglebone specific installation instructions](Beaglebone.md).