Update docs/source/carrierboard_development.rst

Co-authored-by: barsnick <barsnick@users.noreply.github.com>

Author: mhei

docs/source/carrierboard_development.rst

@@ -146,7 +146,7 @@ For a random customer, this might look like this (here with a randomly chosen ve
 
    cb-dt-eeprom --vendor-code 0x6d686569 imx93-charge-som-my-custom-carrier-board.dtbo imx93-charge-som-my-custom-carrier-board.dtbo.sig > dt-eeprom.bin
 
-During carrier board manufacturing, it is assumed that writing the EEPROM is be done via external programmer
+During carrier board manufacturing, it is assumed that writing the EEPROM is done via an external programmer
 which is out-of-scope for this documentation.
 
 But during development phase, it might be necessary to exchange the EEPROM content and/or rewrite it for testing purpose.