Update allow_member_token_management default

Author: juliannatetreault

internal/provider/resource_tfe_team.go

@@ -144,6 +144,7 @@ func resourceTFETeam() *schema.Resource {
 			"allow_member_token_management": {
 				Type:     schema.TypeBool,
 				Optional: true,
+				Default:  true,
 			},
 		},
 	}