ci: use MiniMax-M3 for PR reviews

Author: SaladDay

.github/workflows/ai-pr-review.yml

@@ -90,7 +90,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           use_sticky_comment: true
           claude_args: |
-            --model MiniMax-M2.7-highspeed
+            --model MiniMax-M3
             --max-turns 300
             --allowed-tools Read,Glob,Grep
           prompt: |