Update theme/highlight.js with latest hardware.inc constants

highlight.js hard-codes lists of RGBDS and hardware.inc symbols to be highlighted. Recent hardware.inc updates have added some symbols, and the planned 5.0 update (https://github.com/gbdev/hardware.inc/pull/58) would change many of them.

Note that none of hardware.inc's `B`/`F` bit number/flag constants are actually currently used anywhere in Pan Docs (`git grep -Pnw '[A-Z0-9]+[BF]_[A-Z0-9_]+'`), so none of the documentation itself needs updating.

Start with theme/highlight.js and compare its hard-coded RGBDS and hardware.inc symbol lists with the planned hardware.inc 5.0 changes in pull request 58. Use the issue's git grep command to confirm that B/F bit and flag constants are not used in Pan Docs. Done means the highlighting lists reflect the updated symbols without requiring documentation changes.

Written by the indexing model from the issue text.