actions(claude): use opus for @claude invocations

Author: mufeedvh

.github/workflows/claude.yml

@@ -36,7 +36,7 @@ jobs:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
 
           # Optional: Specify model (defaults to Claude Sonnet 4, uncomment for Claude Opus 4)
-          # model: "claude-opus-4-20250514"
+          model: "claude-opus-4-20250514"
 
           # Optional: Customize the trigger phrase (default: @claude)
           # trigger_phrase: "/claude"