Reinforced Deepslate is located in the items tab

Summary:
Reinforced Deepslate is located in the items tab. It would be more logical if Reinforced Deepslate was in the "nature" tab.

Steps to reproduce:

1. Open your creative inventory.
2. Go to the "Items" tab.
3. Find the new Reinforced Deepslate block.

Observed results:
The new Reinforced Deepslate block is located in the "Items" tab.

Expected results:
The new Reinforced Deepslate block will be located in the nature tab.

Image: