Use download.onnxruntime.ai in podspec (#20474)

### Description
<!-- Describe your changes. -->
Update to more generic url


### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

tools/ci_build/github/apple/upload_pod_archive_and_update_podspec.sh

@@ -33,10 +33,7 @@ POD_ARCHIVE_BASENAME=$(basename "${POD_ARCHIVE_PATH}")
 
 STORAGE_ACCOUNT_NAME="onnxruntimepackages"
 STORAGE_ACCOUNT_CONTAINER_NAME="\$web"
-
-# TODO: See if there's a way to get the new storage account AFD URL using the Azure CLI
-#STORAGE_URL_PREFIX=$(az storage account show --name ${STORAGE_ACCOUNT_NAME} --query "primaryEndpoints.web" --output tsv)
-STORAGE_URL_PREFIX="https://onnxruntimepackages.azureedge.net/"
+STORAGE_URL_PREFIX="https://download.onnxruntime.ai/"
 
 # upload the pod archive and set the podspec source to the pod archive URL
 az storage blob upload \