Use asymmetric VRAM Tile Data example

Both bytes' bit patterns in the current example for VRAM Tile Data are symmetric. This can be ambiguous concerning the bit order. If one is not exactly sure about the bit order, one cannot understand the example. The bytes in the last two rows of the example image are both asymmetric and would therefore make a better example.

Because I am not sure about the bit order, I cannot fix this myself. Thanks to anyone who does.

Locate the current VRAM Tile Data example image in the documentation and read the surrounding explanation of bit order. Replace the symmetric bytes in the last two rows with the asymmetric bytes referenced in the issue, verifying that the resulting image makes the bit order unambiguous.

Written by the indexing model from the issue text.