Updated template with Gen5

Gen4 goes to deprecated state

Author: urosmil

articles/sql-database/scripts/sql-managed-instance-create-powershell-azure-resource-manager-template.md

@@ -71,7 +71,7 @@ The following content should be placed in a file that represents a template that
                 "Description":"GP Instance with custom instance collation - Serbian_Cyrillic_100_CS_AS"
             },
             "sku": {
-                "name": "GP_Gen4",
+                "name": "GP_Gen5",
                 "tier": "GeneralPurpose"
             },
             "properties": {
@@ -81,7 +81,7 @@ The following content should be placed in a file that represents a template that
                 "storageSizeInGB": 256,
                 "vCores": 8,
                 "licenseType": "LicenseIncluded",
-                "hardwareFamily": "Gen4",
+                "hardwareFamily": "Gen5",
                 "collation": "Serbian_Cyrillic_100_CS_AS"
             },
             "type": "Microsoft.Sql/managedInstances",