chore: release version v0.2.1 #225

Job	Run time
ash-ci / mix deps.get	15s
ash-ci / MIX_ENV=test mix.compile	32s
ash-ci / audit	51s
ash-ci / MIX_ENV=dev mix.compile	30s
ash-ci / mix docs	26s
ash-ci / mix sobelow	32s
ash-ci / mix format --check-formatted	26s
ash-ci / mix credo --strict	26s
ash-ci / mix spark.cheat_sheets --check	27s
ash-ci / mix spark.formatter --check	36s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix test	3m 22s
ash-ci / mix deps.unlock --check-unused	33s
ash-ci / mix dialyzer	3m 15s
ash-ci / Deploy docs to GitHub pages.	0s
ash-ci / Release	35s
	12m 46s

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