Describe the Issue
The particle textures for ladder is referencing unity:block/oak_planks, but that file does not exist. The intention was likely to use the default minecraft namespace, since the file does exist there.

To Reproduce
Steps to reproduce the behavior:

1. Load the resource pack in game.
2. Observe the following error in the logs:

   Using missing texture, unable to load unity:textures/block/oak_planks.png : java.io.FileNotFoundException: unity:textures/block/oak_planks.png

Expected Behavior
The particle texture shouldn't use a file that doesn't exist.

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