For those coming to this question new, the author is referencing this template on GitHub.
Once deployed, each step in the ARM template will be referenced by a resourceName. You can see this by going to the deployment overview in the portal and looking at the deployment details (directions). It's a JSON file that will look like this:
{
"id": "/subscriptions/05891207-71be-4043-b79a-dca97166553d/resourceGroups/TEST/providers/Microsoft.Resources/deployments/Microsoft.Template-20210519125443/operations/A5662A62E819E5D9",
"operationId": "A5662A62E819E5D9",
"properties": {
"provisioningOperation": "Create",
"provisioningState": "Succeeded",
"timestamp": "2021-05-19T16:55:16.8357652Z",
"duration": "PT0.8395828S",
"trackingId": "b93d6127-53c7-4abd-b9e4-33cce85a88c4",
"serviceRequestId": "a70ad95e-c9f7-4cc4-95aa-a0e85cf51eda",
"statusCode": "Created",
"targetResource": {
"id": "/subscriptions/05891207-71be-4043-b79a-dca97166553d/resourceGroups/TEST/providers/Microsoft.Storage/storageAccounts/som6677hhn/blobServices/default/containers/logs1",
"resourceType": "Microsoft.Storage/storageAccounts/blobServices/containers",
"resourceName": "som6677hhn/default/logs1"
}
}
},