Fix Saved property XML docs wording

Agent-Logs-Url: https://github.com/PowerShell/PowerShellEditorServices/sessions/3e87bc0c-ffcc-4ce4-9b08-22d248a3f5db

Co-authored-by: JustinGrote <15258962+JustinGrote@users.noreply.github.com>

Author: Copilot

src/PowerShellEditorServices/Extensions/EditorWorkspace.cs

@@ -23,7 +23,7 @@ internal EditorWorkspaceDocument(EditorWorkspace workspace, string path, bool sa
         public string Path { get; }
 
         /// <summary>
-        /// Gets whether the document has unsaved changes.
+        /// Gets whether the document is saved (has no unsaved changes).
         /// </summary>
         public bool Saved { get; }