Update docs/environment.rst

Co-authored-by: Dan Halbert <[email protected]>

Author: jepler

docs/environment.rst

@@ -39,7 +39,7 @@ CIRCUITPY_RESERVED_PSRAM
 ~~~~~~~~~~~~~~~~~~~~~~~~
 On boards with Espressif microcontrollers with PSRAM (also called SPIRAM), permanently reserve a portion of PSRAM for use by esp-idf.
 This storage is removed from the CircuitPython "heap" and is available for allocation by esp-idf routines in the core instead.
-Generally, only set this to a non-zero value when it is requried by a specific core module.
+Generally, only set this to a non-zero value when it is required by a specific core module.
 
 CIRCUITPY_WEB_API_PASSWORD
 ~~~~~~~~~~~~~~~~~~~~~~~~~~