Updated file naming per review

quickstart/201-mysql-fs-db/outputs.tf

@@ -0,0 +1,11 @@
+output "resource_group_name" {
+    value = azurerm_resource_group.default.name
+}
+
+output "azurerm_mysql_flexible_server" {
+    value = azurerm_mysql_flexible_server.default.name
+}
+
+output "mysql_flexible_server_database_name" {
+    value = azurerm_mysql_flexible_database.default.name
+}