Replaced Onigiri with Fallout Shelter (nh-server#192)

Original link is dead and seemingly removed from the eShop. Replaced it with another free-to-play game.

docs/user_guide/getting_started.md

@@ -56,7 +56,7 @@ If your serial number is not listed above, your device is not vulnerable.
 ### Console Preparation
 
 !!! danger "Important"
-    Before setting up the console for homebrew, it is important to have at least one eShop game (such as [Onigiri](https://www.nintendo.com/games/detail/onigiri-switch/)), application (such as [YouTube](https://www.nintendo.com/games/detail/youtube-switch/) or [Hulu](https://www.nintendo.com/games/detail/hulu-switch/)), or a game demo such as [10 Second Run RETURNS](https://www.nintendo.com/games/detail/10-second-run-returns-switch). Running homebrew through any game cartridge will also work, but it must be inserted. Running homebrew does not permanently replace or remove the game/application, nor does it become tied to only one game/application (any cartridge you have inserted or any game/application installed can always be used). Once you have any game or application, you are prepared to continue on with the guide.
+    Before setting up the console for homebrew, it is important to have at least one eShop game (such as [Fallout Shelter](https://www.nintendo.com/games/detail/fallout-shelter-switch/)), application (such as [YouTube](https://www.nintendo.com/games/detail/youtube-switch/) or [Hulu](https://www.nintendo.com/games/detail/hulu-switch/)), or a game demo such as [10 Second Run RETURNS](https://www.nintendo.com/games/detail/10-second-run-returns-switch). Running homebrew through any game cartridge will also work, but it must be inserted. Running homebrew does not permanently replace or remove the game/application, nor does it become tied to only one game/application (any cartridge you have inserted or any game/application installed can always be used). Once you have any game or application, you are prepared to continue on with the guide.