Bump CI to latest Erlang/Elixir version

Author: garazdawi

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
             otp: "27"
           # Test with latest Elixir and Erlang versions
           - elixir: "1.19"
-            otp: "28"
+            otp: "29"
             lint: true
     steps:
       - uses: actions/checkout@v3