Add OTP build

.github/workflows/erlang.yml

@@ -23,6 +23,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    - name: Install Erlang/OTP
+        uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ matrix.otp }}
     - name: Compile
       run: ./rebar3 compile
     - name: Run tests