[Core] Squeeze AVR some more with `-mrelax` and `-mcall-prologues` (#16269)

Merge remote-tracking branch 'origin/master' into develop

[Docs] Anchor link correction in rgb matrix docs (#16460)

Merge remote-tracking branch 'origin/master' into develop

[Keymap] stanrc85 userspace rules cleanup (#16447)

Merge remote-tracking branch 'origin/master' into develop

Link WS2812 driver page from rgb feature docs (#16366)

Merge remote-tracking branch 'origin/master' into develop

[Keyboard] add YMDK YMD21 v2 (#16442)

* [Keyboard] add YMDK YMD21 v2

* remove trailing whitespace from default keymap

Merge remote-tracking branch 'origin/master' into develop

[Docs] Add commands to flashing docs (#16456)

Merge remote-tracking branch 'origin/master' into develop

[Handwired] Support for Adafruit lemon keypad (#16395)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: zvecr <git@zvecr.com>

Merge remote-tracking branch 'origin/master' into develop

[Keyboard] ada1800mini (#16386)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

Merge remote-tracking branch 'origin/master' into develop

Remove 1k USB_POLLING_INTERVAL_MS config from keyboards and default-ish keymaps (#16448)

* Remove 1k USB_POLLING_INTERVAL_MS config from keyboard level

* Remove 1k USB_POLLING_INTERVAL_MS config from default|via keymaps

Start develop for 2022q2

Merge remote-tracking branch 'origin/develop'

Merge '51db8baf77e2c0aa5f54d73114e84a33306d7380' as empty