Set Elixir minimum version to 1.15 for FreeBSD

[jiahuili430]

Overview

Related PR: #5372

Testing recommendations

make elixir

Related Issues or Pull Requests

Checklist

• Code is written and works correctly
• Changes are covered by tests
• Any new configurable parameters are documented in rel/overlay/etc/default.ini
• Documentation changes were made in the src/docs folder
• Documentation changes were backported (separated PR) to affected branches

[jiahuili430]

Thanks to Dave for upgrading Elixir to 1.17 on the FreeBSD workers, so close this PR.

[pgj]

Thanks to Dave for upgrading Elixir to 1.17 on the FreeBSD workers, so close this PR.

This is not only about upgrading the corresponding workers. I would instead say that what matters here is what the current version of the Elixir port is in the Ports Collection. (That is, something that FreeBSD users could install without any further ado.) Fortunately, that is 1.17 for lang/elixir and 1.18 for lang/elixir-devel, so we are indeed good to go.