minor fixes

Author: evgeniy-scherbina

provider/workspace_preset.go

@@ -34,21 +34,21 @@ type WorkspacePrebuild struct {
 	// for utilities that parse our terraform output using this type. To remain compatible
 	// with those cases, we use a slice here.
 	ExpirationPolicy []ExpirationPolicy `mapstructure:"expiration_policy"`
-	Autoscaling      []Autoscaling      `json:"autoscaling,omitempty"`
+	Autoscaling      []Autoscaling      `mapstructure:"autoscaling"`
 }
 
 type ExpirationPolicy struct {
 	TTL int `mapstructure:"ttl"`
 }
 
 type Autoscaling struct {
-	Timezone string     `json:"timezone"`
-	Schedule []Schedule `json:"schedule"`
+	Timezone string     `mapstructure:"timezone"`
+	Schedule []Schedule `mapstructure:"schedule"`
 }
 
 type Schedule struct {
-	Cron      string `json:"cron"`
-	Instances int    `json:"instances"`
+	Cron      string `mapstructure:"cron"`
+	Instances int    `mapstructure:"instances"`
 }
 
 func workspacePresetDataSource() *schema.Resource {