disable ci on 1.12 on windows #433

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 26.x)	1m 42s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	1m 20s
mix test (Elixir 1.12.x \| Erlang/OTP 22.x)	40s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	2m 31s
mix test (Elixir 1.12.x \| Erlang/OTP 23.x)	1m 21s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	2m 27s
mix test (Elixir 1.12.x \| Erlang/OTP 24.x)	1m 3s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	37s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	1m 30s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	1m 22s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	1m 31s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	41s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	1m 28s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	59s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	45s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	2m 16s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	1m 7s
mix test windows (Elixir 1.14.x \| Erlang/OTP 26.x)	1m 38s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	57s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	2m 17s
mix test (Elixir 1.14.x \| Erlang/OTP 26.x)	40s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	1m 23s
mix test windows (Elixir 1.15.x \| Erlang/OTP 26.x)	1m 23s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	1m 12s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	58s
mix test (Elixir 1.15.x \| Erlang/OTP 26.x)	48s
	34m 36s

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