Install elixir for claude code action

Author: ukutaht

.github/workflows/claude.yml

@@ -30,6 +30,12 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Set up Elixir
+        uses: erlef/setup-beam@v1
+        with:
+          elixir-version: '1.19.1'
+          otp-version: '28.1.1'
+
       - name: Run Claude Code
         id: claude
         uses: anthropics/claude-code-action@v1