Update elixir.yml

Author: skosch

.github/workflows/elixir.yml

@@ -17,8 +17,8 @@ jobs:
     - name: Set up Elixir
       uses: actions/setup-elixir@v1
       with:
-        elixir-version: '1.10.3' # Define the elixir version [required]
-        otp-version: '22.3' # Define the OTP version [required]
+        elixir-version: '1.11.2' # Define the elixir version [required]
+        otp-version: '23.2' # Define the OTP version [required]
     - name: Restore dependencies cache
       uses: actions/cache@v2
       with: