chore: support github models

Author: chao.an

.github/workflows/cr.yml

@@ -15,8 +15,7 @@ jobs:
       - uses: anc95/ChatGPT-CodeReview@main
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           LANGUAGE: English
-          OPENAI_API_ENDPOINT: https://api.bianxie.ai/v1
+          USE_GITHUB_MODELS: true
           LOG_LEVEL: debug
           INCLUDE_PATTERNS: 'src/*'