docs: fix incorrect username in example. (#496) #1062

Job	Run time
mix deps.get	26s
mix hex.audit	30s
MIX_ENV=test mix.compile	50s
mix format --check-formatted	46s
mix credo --strict	44s
mix doctor --full --raise	42s
mix spark.formatter --check	57s
mix test	1m 13s
mix dialyzer	1m 9s
mix git_ops.check_message	46s
mix sobelow --config	42s
mix spark.cheat_sheets --check	48s
mix deps.unlock --check-unused	42s
mix ash_postgres.generate_migrations --check	51s
MIX_ENV=dev mix.compile	48s
mix git-ops.release	54s
mix docs	46s
Deploy docs to GitHub pages.	8s
	13m 42s

Provide feedback