switch model to gpt5mini

Author: renejeglinsky

.github/workflows/ai-review.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: SAP/ai-assisted-github-actions/pr-review@v3
         with:
           aicore-service-key: ${{ secrets.AICORE_SERVICE_KEY }}
-          model: mistralai--mistral-small-instruct
+          model: gpt-5-mini
           model-parameters: '{"temperature": 0.1}'
           prompt: |
             As an AI bot reviewing documentation pull requests on GitHub, please focus on the following areas to ensure high-quality and effective documentation: