Clarify Content & Files feature

Author: ndbroadbent

docs/src/content/docs/index.mdx

@@ -20,7 +20,7 @@ import { Card, CardGrid, LinkCard } from '@astrojs/starlight/components';
     Replaces snake_case, camelCase, PascalCase, kebab-case, etc.
   </Card>
   <Card title="Content & Files" icon="document">
-    Renames both file contents and files/directories in a single operation.
+    Replaces file contents and renames files/directories in a single operation.
   </Card>
   <Card title="Safe & Atomic" icon="seti:lock">
     Plan then apply atomically with full undo/redo. No partial states.