Fix reference to nonexistent command (nushell#2024)

Author: ItsHarper

lang-guide/chapters/types/basic_types/binary.md

@@ -18,7 +18,7 @@
 
 ## Common commands that can be used with `binary`
 
-- `into bits`
+- `into binary`
 - `bits` subcommands (see `help bits` for a list)
 - `bytes` subcommands (see `help bytes` for a list)
 - `encode`