Added pygamer example

Author: Nereuxofficial

README.md

@@ -62,6 +62,7 @@ let mut cont: VolumeManager<_, _, 6, 12, 4> = VolumeManager::new_with_limits(blo
 This repository houses no examples for no-std usage, however you can check out the following examples:
 - [Pi Pico](https://github.com/rp-rs/rp-hal-boards/blob/main/boards/rp-pico/examples/pico_spi_sd_card.rs)
 - [STM32H7XX](https://github.com/stm32-rs/stm32h7xx-hal/blob/master/examples/sdmmc_fat.rs)
+- [atsamd(pygamer)](https://github.com/atsamd-rs/atsamd/blob/master/boards/pygamer/examples/sd_card.rs)
 
 ## Todo List (PRs welcome!)