update action config

.github/workflows/reademe-contributors.yml

@@ -15,6 +15,6 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          image_size: 65
+          image_size: 75
           columns_per_row: 8
           commit_message: '🫶 更新贡献者列表'