Update the API version for Servers so that it works with OutboundFirewallRules (Azure#14687)

* Update the API version for Servers so that it works with OutboundFirewallRules

* Sort APIs

Author: VMMicrosoft

specification/sql/resource-manager/readme.md

@@ -131,7 +131,6 @@ input-file:
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerDnsAliases.json
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerKeys.json
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerOperations.json
-- ./Microsoft.Sql/preview/2020-11-01-preview/Servers.json
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerSecurityAlertPolicies.json
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerTrustGroups.json
 - ./Microsoft.Sql/preview/2020-11-01-preview/ServerVulnerabilityAssessments.json
@@ -154,6 +153,7 @@ input-file:
 - ./Microsoft.Sql/preview/2021-02-01-preview/OutboundFirewallRules.json
 - ./Microsoft.Sql/preview/2021-02-01-preview/RestorableDroppedDatabases.json
 - ./Microsoft.Sql/preview/2021-02-01-preview/RestorableDroppedManagedDatabases.json
+- ./Microsoft.Sql/preview/2021-02-01-preview/Servers.json
 - ./Microsoft.Sql/preview/2021-02-01-preview/Usages.json