fix: don't double escape `modify_open_api` #773

Job	Run time
ash-ci / mix deps.get	15s
ash-ci / audit	33s
ash-ci / MIX_ENV=test mix.compile	31s
ash-ci / MIX_ENV=dev mix.compile	32s
ash-ci / mix dialyzer	3m 27s
ash-ci / mix sobelow	34s
ash-ci / mix credo --strict	24s
ash-ci / mix format --check-formatted	33s
ash-ci / mix spark.cheat_sheets --check	33s
ash-ci / mix spark.formatter --check	22s
ash-ci / mix deps.unlock --check-unused	32s
ash-ci / mix test	1m 15s
ash-ci / mix docs	25s
ash-ci / Deploy docs to GitHub pages.	7s
ash-ci / Release	0s
	10m 3s

Provide feedback