Revert "Update destination for appcast XML files"

We're back to s3.

Author: calmh

.github/workflows/generate-appcast.yml

@@ -19,8 +19,12 @@ jobs:
       - name: Push to object store
         uses: docker://docker.io/rclone/rclone:latest
         env:
-          RCLONE_CONFIG_OBJSTORE_TYPE: ${{ secrets.AZUREBLOB_TYPE }}
-          RCLONE_CONFIG_OBJSTORE_ACCOUNT: ${{ secrets.AZUREBLOB_ACCOUNT }}
-          RCLONE_CONFIG_OBJSTORE_KEY: ${{ secrets.AZUREBLOB_KEY }}
+          RCLONE_CONFIG_OBJSTORE_TYPE: s3
+          RCLONE_CONFIG_OBJSTORE_PROVIDER: ${{ secrets.S3_PROVIDER }}
+          RCLONE_CONFIG_OBJSTORE_ACCESS_KEY_ID: ${{ secrets.S3_ACCESS_KEY_ID }}
+          RCLONE_CONFIG_OBJSTORE_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_ACCESS_KEY }}
+          RCLONE_CONFIG_OBJSTORE_ENDPOINT: ${{ secrets.S3_ENDPOINT }}
+          RCLONE_CONFIG_OBJSTORE_REGION: ${{ secrets.S3_REGION }}
+          RCLONE_CONFIG_OBJSTORE_ACL: public-read
         with:
           args: copy appcast.xml objstore:macos/appcast/