fix: properly add absinthe_phoenix dependency in installer #1360

Job	Run time
ash-ci / audit	38s
ash-ci / mix deps.get	14s
ash-ci / mix igniter.upgrade	3s
ash-ci / MIX_ENV=test mix.compile	46s
ash-ci / mix spark.formatter --check	48s
ash-ci / mix docs	2m 8s
ash-ci / mix format --check-formatted	39s
ash-ci / mix credo --strict	49s
ash-ci / mix sobelow	49s
ash-ci / mix spark.cheat_sheets --check	42s
ash-ci / mix deps.unlock --check-unused	40s
ash-ci / MIX_ENV=dev mix.compile	34s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix dialyzer	3m 52s
ash-ci / mix test	1m 22s
ash-ci / Deploy docs to GitHub pages.	8s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	14m 12s

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