Via the Steam Community:

GAMEPLAY

• Adjusted ground smoothing at locations where the player can stand on very thin ledges.

ANIMGRAPH 2

• Minor adjustments to viewmodel animations.

MISC

• Corrected some improper character texture assignments.
• Trade offers containing Counter-Strike 2 items are now limited to 1,000 items.

Rumor has it:

• Size is ~70 MB (with Workshop Tools installed)