Update Ecto version to support associations in polymorphic embeds

[suprafly]

Ecto has added the ability for an embedded schema to preload associations in version 3.5.

However, this library is still on ecto 3.11. So using this feature throws an error when attempting to preload an association on a polymorphic embedded schema -

[error] Task #PID<0.751.0> started from #PID<0.749.0> terminating
** (ArgumentError) cannot load `"02256ee1-fe8d-489d-b98d-fbbdf3168fe1"` as type :id for field `upload_id` in schema AudioField
    (ecto 3.11.2) lib/ecto/schema/loader.ex:76: anonymous fn/5 in Ecto.Schema.Loader.unsafe_load/4
    (elixir 1.16.3) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
    (polymorphic_embed 4.1.1) lib/polymorphic_embed.ex:485: PolymorphicEmbed.do_load/3
    (ecto 3.11.2) lib/ecto/type.ex:935: Ecto.Type.process_loaders/3
    (ecto 3.11.2) lib/ecto/repo/queryable.ex:423: Ecto.Repo.Queryable.struct_load!/6
    (ecto 3.11.2) lib/ecto/repo/queryable.ex:246: anonymous fn/5 in Ecto.Repo.Queryable.preprocessor/3
    (elixir 1.16.3) lib/enum.ex:1700: Enum."-map/2-lists^map/1-1-"/2
    (ecto 3.11.2) lib/ecto/repo/queryable.ex:237: Ecto.Repo.Queryable.execute/4
    (ecto 3.11.2) lib/ecto/repo/queryable.ex:19: Ecto.Repo.Queryable.all/3
    (ecto 3.11.2) lib/ecto/repo/preloader.ex:284: Ecto.Repo.Preloader.fetch_query/8
    (elixir 1.16.3) lib/task/supervised.ex:101: Task.Supervised.invoke_mfa/2
    (elixir 1.16.3) lib/task/supervised.ex:36: Task.Supervised.reply/4
Function: &:erlang.apply/2
    Args: [#Function<10.81589436/1 in Ecto.Repo.Preloader.maybe_pmap/3>, [#Function<21.81589436/1 in Ecto.Repo.Preloader.prepare_queries/6>]]
** (EXIT from #PID<0.749.0>) shell process exited with reason: an exception was raised:
    ** (ArgumentError) cannot load `"02256ee1-fe8d-489d-b98d-fbbdf3168fe1"` as type :id for field `upload_id` in schema AudioField
        (ecto 3.11.2) lib/ecto/schema/loader.ex:76: anonymous fn/5 in Ecto.Schema.Loader.unsafe_load/4
        (elixir 1.16.3) lib/enum.ex:2528: Enum."-reduce/3-lists^foldl/2-0-"/3
        (polymorphic_embed 4.1.1) lib/polymorphic_embed.ex:485: PolymorphicEmbed.do_load/3
        (ecto 3.11.2) lib/ecto/type.ex:935: Ecto.Type.process_loaders/3
        (ecto 3.11.2) lib/ecto/repo/queryable.ex:423: Ecto.Repo.Queryable.struct_load!/6
        (ecto 3.11.2) lib/ecto/repo/queryable.ex:246: anonymous fn/5 in Ecto.Repo.Queryable.preprocessor/3
        (elixir 1.16.3) lib/enum.ex:1700: Enum."-map/2-lists^map/1-1-"/2
        (ecto 3.11.2) lib/ecto/repo/queryable.ex:237: Ecto.Repo.Queryable.execute/4
        (ecto 3.11.2) lib/ecto/repo/queryable.ex:19: Ecto.Repo.Queryable.all/3
        (ecto 3.11.2) lib/ecto/repo/preloader.ex:284: Ecto.Repo.Preloader.fetch_query/8
        (elixir 1.16.3) lib/task/supervised.ex:101: Task.Supervised.invoke_mfa/2
        (elixir 1.16.3) lib/task/supervised.ex:36: Task.Supervised.reply/4

[suprafly]

Hm this may not be related to the Ecto version after all. I tried to fork and solve solve it, but it does not seem to work. Will close because it is probably not an issue with the library as I initially thought.