fix(ci): avoid setting r2 cors during changelog sync

.github/r2-cors.json

@@ -1,11 +0,0 @@
-{
-  "CORSRules": [
-    {
-      "AllowedHeaders": ["*"],
-      "AllowedMethods": ["GET", "HEAD"],
-      "AllowedOrigins": ["*"],
-      "ExposeHeaders": ["ETag"],
-      "MaxAgeSeconds": 3600
-    }
-  ]
-}

.github/workflows/sync-changelog.yml

@@ -28,10 +28,6 @@ jobs:
       - name: Upload to R2
         run: |
           pip install awscli --quiet
-          aws s3api put-bucket-cors \
-            --bucket "${R2_BUCKET_NAME}" \
-            --cors-configuration file://.github/r2-cors.json \
-            --endpoint-url "https://${R2_ACCOUNT_ID}.r2.cloudflarestorage.com"
           aws s3 cp releases-cn.json "s3://${R2_BUCKET_NAME}/changelog/releases-cn.json" \
             --endpoint-url "https://${R2_ACCOUNT_ID}.r2.cloudflarestorage.com" \
             --content-type application/json