Deployment update (#405)

1. Address PowerShell deployment script error.
2. Adds an optional step to help users seeing the error: `ERROR:
reauthentication required`

Author: KSchlobohm

README.md

@@ -153,7 +153,12 @@ azd env set AZURE_LOCATION <pick_a_region>
 
 ### 5. Create the Azure resources and deploy the code
 
-Run the following command to create the Azure resources and deploy the code (about 15-minutes to complete):
+(Optional) If your account has access to using multiple tenants, then you should reauthenticate before proceeding:
+```pwsh
+azd auth login --scope https://management.azure.com//.default
+```
+
+Run the following command to create the Azure resources and deploy the code (about 25-minutes to complete):
 
 ```pwsh
 azd up

infra/core/database/create-sql-user-and-role.bicep

@@ -57,7 +57,7 @@ resource createSqlUserAndRole 'Microsoft.Resources/deploymentScripts@2020-10-01'
     }
     properties: {
       forceUpdateTag: uniqueScriptId
-      azPowerShellVersion: '7.4'
+      azPowerShellVersion: '14.0'
       retentionInterval: 'PT1H'
       cleanupPreference: 'OnSuccess' // No need to keep around any background resources if succeeded
       arguments: join(