Change sku/tier

Author: pamelafox

infra/resources.bicep

@@ -193,11 +193,11 @@ resource postgresServer 'Microsoft.DBforPostgreSQL/flexibleServers@2022-01-20-pr
   tags: tags
   name: pgServerName
   sku: {
-    name: 'Standard_D2ds_v4'
-    tier: 'GeneralPurpose'
+    name: 'Standard_B1ms'
+    tier: 'Burstable'
   }
   properties: {
-    version: '13'
+    version: '12'
     administratorLogin: 'postgresadmin'
     administratorLoginPassword: databasePassword
     storage: {