Complete bootstrap milestone

README.md

@@ -4,9 +4,10 @@ Rivencraft is a clean, incremental port of the ideas and gameplay of
 [Mystcraft Legacy](https://github.com/Mystcraft/Mystcraft-Legacy) to Minecraft
 1.21.1 on NeoForge.
 
-The project is at the bootstrap stage. It currently provides a valid NeoForge
-mod, a creative tab, and a placeholder Descriptive Book item. Age generation,
-linking, symbols, instability, and writing mechanics have not been ported yet.
+The bootstrap milestone is complete. The project currently provides a valid
+NeoForge mod, a creative tab, and an unwritten Descriptive Book item. Age
+generation, linking, symbols, instability, and writing mechanics have not been
+ported yet.
 
 ## Requirements