fix type in the new architecture pillars section (facebook#3297)

Author: Riccardo

docs/the-new-architecture/pillars.md

@@ -1,6 +1,6 @@
 ---
 id: pillars
-title: What Compose the New Architecture
+title: What Composes the New Architecture
 ---
 
 import NewArchitectureWarning from '../\_markdown-new-architecture-warning.mdx';