std.Progress: call refreshWithHeldLock as appropriate

lib/std/Progress.zig

@@ -103,12 +103,10 @@ pub const Node = struct {
             }
             parent.completeOne();
         } else {
-            {
-                const held = self.context.update_lock.acquire();
-                defer held.release();
-                self.context.done = true;
-            }
-            self.context.refresh();
+            const held = self.context.update_lock.acquire();
+            defer held.release();
+            self.context.done = true;
+            self.context.refreshWithHeldLock();
         }
     }