Fix comment

Author: phil-allen-msft

src/LibraryManager/Providers/BaseProvider.cs

@@ -440,6 +440,7 @@ protected virtual string GetCachedFileLocalPath(ILibraryInstallationState state,
         /// Copies ILibraryInstallationState files to cache
         /// </summary>
         /// <param name="state"></param>
+        /// <param name="library"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
         private async Task<ILibraryOperationResult> RefreshCacheAsync(ILibraryInstallationState state, ILibrary library, CancellationToken cancellationToken)