fix(ci): use offical elixir action

Author: mydearxym

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
         with:
           configFile: .commitlintrc.js
       - name: Set up Elixir and OTP
-        uses: actions/setup-elixir@v1
+        uses: erlef/setup-elixir@v1
         with:
           elixir-version: "1.10.3" # Define the elixir version [required]
           otp-version: "22.3" # Define the OTP version [required]