Deepslate brick sound events reference a nonexistent step6 file, causing the sounds to sometimes not play

Deepslate Brick sounds sometimes fail to play fall or use sounds because these sound events reference a sound named step6 which does not actually exist in the files. This is the partial cause of MCPE-155381.

Here are all the files in the deepslate_bricks folder. Note the lack of a step6 file:

Affected Sound Events:

• fall.deepslate_bricks
• use.deepslate_bricks

Hit, step, land, and jump sounds are not affected, as they correctly include only step1-5:

Expected Result

Deepslate Brick sound events only reference step1-5, to match the sound files.

Observed Result

Some Deepslate Brick sound events reference step6, which does not exist in the sound files.