[docs] Remove last references to RPi (#2885)

This updates the documentation to remove the last stray references to
the copaganda Pi. It now uses the the term single-board computer. GtS
can run fine on all kinds of SBCs and isn't limited to that one
particular fruit version.

README.md

@@ -128,7 +128,7 @@ Plenty of [config options](./example/config.yaml) for admins to play around with
 
 No external dependencies apart from a database (or just use SQLite!). Simply download the binary + assets (or Docker container), and run.
 
-GoToSocial plays nice with lower-powered machines like Raspberry Pi, old laptops and tiny $5/month VPSes.
+GoToSocial plays nice with single-board computers, old laptops and tiny $5/month VPSes.
 
 ### Safety + security features
 

docs/configuration/database.md

@@ -6,7 +6,7 @@ By default, GoToSocial will use Postgres, but this is easy to change.
 
 ## SQLite
 
-SQLite, as the name implies, is the lightest database type that GoToSocial can use. It stores entries in a simple file format, usually in the same directory as the GoToSocial binary itself. SQLite is great for small instances and lower-powered machines like Raspberry Pi, where a dedicated database would be overkill.
+SQLite, as the name implies, is the lightest database type that GoToSocial can use. It stores entries in a simple file format, usually in the same directory as the GoToSocial binary itself. SQLite is great for small instances and single-board computers, where a dedicated database would be overkill.
 
 To configure GoToSocial to use SQLite, change `db-type` to `sqlite`. The `address` setting will then be a filename instead of an address, so you will want to change it to `sqlite.db` or something similar.