chore: Update presubmit.ai configuration

.github/workflows/presubmit.yml

@@ -6,9 +6,9 @@ permissions:
     issues: write
 
 on:
-  pull_request_target: # Handle forked repository PRs in the base repository context
+    pull_request_target:
         types: [opened, synchronize]
-  pull_request_review_comment: # Handle review comments
+    pull_request_review_comment:
         types: [created]
 
 jobs:
@@ -21,15 +21,8 @@ jobs:
                     echo "Error: LLM_API_KEY secret is not configured"
                     exit 1
                   fi
-
+            - uses: presubmit/ai-reviewer@latest
-      - name: Check out PR code
-        uses: actions/checkout@v3
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-
-      - name: Run AI Reviewer
-        uses: presubmit/ai-reviewer@latest
               env:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
                   LLM_API_KEY: ${{ secrets.LLM_API_KEY }}
-          LLM_MODEL: "gemini-1.5-flash"
+                  LLM_MODEL: "gpt-5-nano"