Update CI

Author: wojtekmach

.github/workflows/ci.yml

@@ -14,8 +14,8 @@ jobs:
               elixir: "1.15"
               otp: "24.3.4.10"
           - pair:
-              elixir: "1.17"
-              otp: "27.0.1"
+              elixir: "1.18"
+              otp: "27.3.4.2"
             lint: lint
     steps:
       - uses: actions/checkout@v4