chore(deps-dev): bump ex_doc from 0.38.3 to 0.38.4 in the dev-dependencies group #450

Job	Run time
ash-ci / audit	2m 38s
ash-ci / MIX_ENV=test mix.compile	2m 33s
ash-ci / Community Files Check	4s
ash-ci / mix igniter.upgrade	9s
ash-ci / Report Mix Dependencies	0s
ash-ci / mix spark.formatter --check	26s
ash-ci / mix format --check-formatted	25s
ash-ci / mix deps.unlock --check-unused	25s
ash-ci / MIX_ENV=dev mix.compile	2m 21s
ash-ci / mix test	3m 22s
ash-ci / mix credo --strict	1m 8s
ash-ci / mix spark.cheat_sheets --check	1m 2s
ash-ci / mix sobelow	30s
ash-ci / mix dialyzer	4m 1s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix doctor --full --raise	0s
ash-ci / mix git_ops.check_message	0s
ash-ci / mix docs	2m 16s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
ash-ci / Deploy docs to GitHub pages.	0s
	21m 20s

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