Update Elixir version from 1.19.3 to 1.19.4

Author: josevalim

_data/elixir-versions.yml

@@ -5,7 +5,7 @@ v1_19:
   minimum_otp: 26.0
   recommended_otp: 28.1
   otp_versions: [28, 27, 26]
-  version: 1.19.3
+  version: 1.19.4
 
 v1_18:
   name: v1.18