data: fix stacked cabin in Natla's Mines

This replaces the flip off/on indices in the first group of triggers in
room 85 with the index for the cabin area (3).

Resolves #1052.

CHANGELOG.md

@@ -15,6 +15,7 @@
 - changed the way music timestamps are internally handled – resets music position in existing saves
 - changed vertex and fragment shaders into unified files that are runtime pre-processed for OpenGL versions 2.1 or 3.3
 - fixed a missing translation for the Spanish config tool for the Eidos logo skip option (#1151)
+- fixed a flipmap issue in Natla's Mines that could make the cabin appear stacked and prevent normal gameplay (#1052)
 
 ## [3.1.1](https://github.com/LostArtefacts/TR1X/compare/3.1...3.1.1) - 2024-01-19
 - changed quick load to show empty passport instead of opening the save game menu when there are no saves (#1141)

README.md

@@ -311,6 +311,7 @@ Not all options are turned on by default. Refer to `TR1X_ConfigTool.exe` for det
     - **Tomb of Tihocan**: missing trigger in room 62 for enemy 34
     - **City of Khamoon**: incorrect trapdoor trigger types in rooms 31 and 34
     - **Obelisk of Khamoon**: missing switch trigger type in room 66
+    - **Natla's Mines**: incorrect flipmap indices in room 85
     - **Atlantean Stronghold**: fixed poorly configured portals between rooms 74 and 12
 - fixed various bugs with falling movable blocks
 - fixed bugs when trying to stack multiple movable blocks