January 17, 2023 Patch

{{Patch layout
 * source      = https://store.steampowered.com/news/app/620/view/6761625488931174616
 * source-title = Portal 2 - Update
 * before      = {{patch name|12|15|2022}}
 * day         = 17
 * month       = 1
 * year        = 2023
 * after       =
 * notes       = === Portal 2 ===
 * Minor code maintenance, no customer-facing changes.

Undocumented changes
}}
 * Renamed the soundtrack folder from  to.