Update dependency elixir to v1.19.4 (#174)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.tool-versions

@@ -1,2 +1,2 @@
 erlang 28.2
-elixir 1.19.3
+elixir 1.19.4