ATmega328P is incorrectly called "ATmega328" in multiple places on arduino.cc

As stated in https://github.com/arduino/Arduino/issues/6369, this causes much confusion, suffering and generally makes Arduino look bad. Let's use the correct name! That extra "P" is really not so scary is it?

The following pages incorrectly call the ATmega328P "ATmega328"
- ~~https://cdn.arduino.cc/reference/en/language/functions/analog-io/analogreference/~~
- https://store.arduino.cc/usa/arduino-ethernet-rev3-with-poe (overview, tech specs, documentation tabs)
- https://store.arduino.cc/usa/arduino-ethernet-rev3-without-poe
- https://store.arduino.cc/usa/arduino-mini-05 (overview, tech specs, documentation tabs)
- https://store.arduino.cc/usa/arduino-nano (overview tab, tech specs tab, documentation tab)
- https://store.arduino.cc/usa/arduino-uno-rev3 (documentation tab)
- https://store.arduino.cc/usa/arduino-uno-rev3-with-long-pins
- https://store.arduino.cc/usa/arduino/arduino-boards-modules/arduino-ethernet-rev3-with-poe (overview, tech specs, documentation tabs)
- https://store.arduino.cc/usa/arduino/arduino-ethernet-rev3-with-poe (overview, tech specs, documentation tabs)
- https://www.arduino.cc/en/Guide/ArduinoBT
- https://www.arduino.cc/en/Guide/ArduinoMini
- https://www.arduino.cc/en/Guide/ArduinoNano
- https://www.arduino.cc/en/Guide/ArduinoPro
- https://www.arduino.cc/en/Guide/ArduinoProMini
- https://www.arduino.cc/en/Guide/Environment
- https://www.arduino.cc/en/Guide/Environment0018
- https://www.arduino.cc/en/Guide/HowtoBoard
- https://www.arduino.cc/en/Guide/LilyPadMacOSX
- https://www.arduino.cc/en/Guide/LilyPadWindows
- https://www.arduino.cc/en/Guide/Troubleshooting
- https://www.arduino.cc/en/Hacking/HomePage
- https://www.arduino.cc/en/Hacking/PinMapping
- https://www.arduino.cc/en/Hacking/PinMapping168
- https://www.arduino.cc/en/Main/ArduinoBoardBT?from=Main.ArduinoBoardBluetooth
- https://www.arduino.cc/en/Main/ArduinoBoardDuemilanove
- https://www.arduino.cc/en/Main/ArduinoBoardFioProgramming
- https://www.arduino.cc/en/Main/ArduinoBoardFioProgramming2
- https://www.arduino.cc/en/Main/ArduinoBoardLilyPad (says "ATmega328V" but if you look at the product photo sure enough it's a ATmega328P!)
- https://www.arduino.cc/en/Main/ArduinoBoardLilyPadSimple
- https://www.arduino.cc/en/Main/ArduinoBoardProMini
- https://www.arduino.cc/en/Main/ArduinoBoardUnoSMD
- https://www.arduino.cc/en/Main/Boards (Arduino LilyPad says "ATmega328V", Arduino Nano)
- https://www.arduino.cc/en/Main/Standalone
- ~~https://www.arduino.cc/en/Reference/AnalogReference~~
- ~~https://www.arduino.cc/en/Reference/AnalogWrite~~
- https://www.arduino.cc/en/Reference/Board
- https://www.arduino.cc/en/Reference/EEPROM
- https://www.arduino.cc/en/Tutorial/AnalogInputPins
- https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard (multiple places on the page and also the board name in the hardware core downloads linked to from the page)
- https://www.arduino.cc/en/Tutorial/Memory
- https://www.arduino.cc/en/Tutorial/SecretsOfArduinoPWM
- https://www.arduino.cc/en/uploads/Main/Arduino-Pro-Mini-schematic.pdf
- https://www.arduino.cc/en/uploads/Main/ArduinoNano30Schematic.pdf

Start by reviewing the listed Arduino and store pages, using issue #6369 for context and treating the struck-through URLs as already corrected. Update each remaining ATmega328, ATmega328V, or otherwise incorrect reference to the proper ATmega328P name, then verify all listed pages and documents no longer use the incorrect naming.

Written by the indexing model from the issue text.