fixes:(XMLDOC): update xml comment (#6999)

* fixes:(XMLDOC): update xml comment

* Update src/Avalonia.Controls/Grid.cs

Co-authored-by: Steven Kirk <grokys@users.noreply.github.com>

Co-authored-by: Steven Kirk <grokys@users.noreply.github.com>

src/Avalonia.Controls/Grid.cs

@@ -978,7 +978,7 @@ namespace Avalonia.Controls
         /// width is not registered in columns.</param>
         /// <param name="forceInfinityV">Passed through to MeasureCell.
         /// When "true" cells' desired height is not registered in rows.</param>
-        /// <param name="hasDesiredSizeUChanged">return true when desired size has changed</param>
+        /// <param name="hasDesiredSizeUChanged">When the method exits, indicates whether the desired size has changed.</param>
         private void MeasureCellsGroup(
             int cellsHead,
             Size referenceSize,

src/Skia/Avalonia.Skia/Gpu/ISkiaGpu.cs

@@ -20,8 +20,8 @@ namespace Avalonia.Skia
         /// <summary>
         /// Creates an offscreen render target surface
         /// </summary>
-        /// <param name="size">size in pixels</param>
-        /// <param name="session">current Skia render session</param>
+        /// <param name="size">size in pixels.</param>
+        /// <param name="session">An optional custom render session.</param>
         ISkiaSurface TryCreateSurface(PixelSize size, ISkiaGpuRenderSession session);
     }