Update Notes for Patch v1.2.12.p14

This is a small patch for fixing a few procedural map generation errors:

* Fixed a map generation issue where the locked room in the Lair map blocked progress to the rest of the lab area.
* Fixed a rare issue where some of the optional events are placed in an unreachable tile.
* Fixed minor placement issues with the "Vent", "Punching Machine" and "Shape Sorter" events.