chore: update dev instructions to include nox -s format (#2559)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: ohmayr

DEVELOPMENT.md

@@ -23,7 +23,7 @@ Execute unit tests by running one of the sessions prefixed with `unit-`.
 
 ## Formatting
 
--   Lint sources by running `nox -s blacken`. Use `nox -s lint` to run lint check.
+-   Format sources by running `nox -s format`. Use `nox -s lint` to run lint check.
 
 ## Integration Tests