Inconsistency: Deepslate Bricks doesn't have polished in its name

Despite deepslate bricks are crafted with polished deepslate, it is called "Deepslate Bricks" instead of "Polished Deepslate Bricks" which is inconsistent with Polished Blackstone Bricks. Relates to MC-216994.

Alternatively, change the recipe to use regular deepslate instead of polished deepslate for consistency with stone bricks.