Update Sources/Automerge/Document.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

Sources/Automerge/Document.swift

@@ -583,7 +583,7 @@ public final class Document: @unchecked Sendable {
     /// Establish a cursor at the position you specify in the list or text object you provide.
     ///
     /// In collaborative applications, maintaining stable cursor positions is crucial. Traditional index-based
-    /// positions can become outdated due to document modifications. This method ensures the cursor stays
+    /// positions become outdated when you or collaborators modify the document. This method provides a stable reference to a character that stays
     /// correctly anchored regardless of changes.
     ///
     /// `Cursor` provides a reliable way to track positions over time without being affected by document changes.