tr2/data: fix Gong Hammer pickup trigger

This extends the Gong Hammer's pickup trigger into the adjacent tile to
ensure it is detected regardless of Lara's position.

Resolves #1716.

docs/tr2/CHANGELOG.md

@@ -21,6 +21,7 @@
 - fixed screenshots sometimes crashing in the windowed mode (regression from 0.6)
 - fixed the detonator key and gong hammer not activating their target items when manually selected from the inventory (#1887)
 - fixed wrongly positioned doors in Ice Palace and Floating Islands, which caused invisible walls (#1963)
+- fixed picking up the Gong Hammer in Ice Palace sometimes not opening the nearby door (#1716)
 
 ## [0.6](https://github.com/LostArtefacts/TRX/compare/tr2-0.5...tr2-0.6) - 2024-11-06
 - added a fly cheat key (#1642)

docs/tr2/README.md

@@ -44,7 +44,7 @@ decompilation process. We recognize that there is much work to be done.
     - **Opera House**: fixed the trigger under item 203 to trigger it rather than item 204
     - **Tibetan Foothills**: added missing triggers for the drawbridge in room 96 (after the flipmap)
     - **Catacombs of the Talion**: added missing triggers and ladder in room 116 (after the flipmap)
-    - **Ice Palace**: fixed door 143's position to resolve the invisible wall in front of it
+    - **Ice Palace**: fixed door 143's position to resolve the invisible wall in front of it, and added an extra pickup trigger beside the Gong Hammer in room 29
     - **Temple of Xian**: fixed missing death tiles in room 91
     - **Floating Islands**: fixed door 72's position to resolve the invisible wall in front of it