docs: fix typo

Author: DASPRiD

README.md

@@ -35,7 +35,7 @@ static light, otherwise a blinking one.
 ## Pre-requisites
 
 Before you can deploy the Bloop Box client you need to set up the Raspberry Pi of course, including audio and NFC. If
-you are using our reference design for the hardware, the steps to take are document in the
+you are using our reference design for the hardware, the steps to take are documented in the
 [System setup section](#system-setup).
 
 ## Shared data