Update CHANGELOG.md

CHANGELOG.md

@@ -7,6 +7,7 @@ Put the changelog BELOW the dashes. ANYTHING ABOVE IS IGNORED
   - This includes Stairs, Slabs, and Walls for Mossy Mud Bricks.
   - Alongside these additions, Stonecutters now have Mud recipes for the sake of consistency and ease of use.
   - These blocks now generate in Trail Ruins.
+- Added Sculk Stairs, Slabs, and Walls to their respective Vanilla tags.
 - Updated the texture for the Scorching effect's icon.
 - The Scorching effect now places Fire upon a mob's death.
 - Increased the max time the Scorching effect sets attackers on fire from 4 to 8 seconds.