chore: update sizes

Author: lit-robot

docs/size.md

@@ -35,7 +35,7 @@ dependencies. We track three metrics:
 <!-- Autogenerated below, do not update! -->
 <!-- MWC_UPDATE_TRACKING_START -->
 
-<sub>Last updated 2025-08-20.</sub>
+<sub>Last updated 2025-08-21.</sub>
 
 <!-- mdformat off(autogenerated might break rendering in catalog) -->