Revert "fix: bump to OTP-27.3.4.2-7"

Author: zmstone

RELEASE.md

@@ -6,5 +6,5 @@ Uncomment older releases when there is an update.
 
 + OTP-24.3.4.2-4,Elixir-1.15.7
 + OTP-26.2.5.14-1,Elixir-1.15.7
-+ OTP-27.3.4.2-7,Elixir-1.18.3
++ OTP-27.3.4.2-6,Elixir-1.18.3
 + OTP-28.4.1-2,Elixir-1.19.1