Allow leaves as Age spawn footing

README.md

@@ -36,7 +36,8 @@ independently validates every link.
 Open a page-free Descriptive Book, name its Age, and press Create. Rivencraft
 assigns the book a permanent Age UUID, creates a dedicated vanilla-like runtime
 dimension, and prepares a five-by-five cobblestone arrival platform at the
-highest suitable nearby terrain. If no sturdy surface is available, the
+highest suitable nearby terrain. Solid blocks and tree leaves are valid
+footing. If no suitable surface is available, the
 platform is generated at Y=63. Reopen the book and click its preview to travel.
 Copies of the written book continue to resolve to the same persistent Age
 across server restarts.