Standardize comments

src/Avalonia.Visuals/Media/Color.cs

@@ -290,7 +290,7 @@ namespace Avalonia.Media
         }
 
         /// <summary>
-        /// Gets the HSV color model equivalent of this RGB color.
+        /// Returns the HSV color model equivalent of this RGB color.
         /// </summary>
         /// <returns>The HSV equivalent color.</returns>
         public HsvColor ToHsv()

src/Avalonia.Visuals/Media/HsvColor.cs

@@ -156,7 +156,7 @@ namespace Avalonia.Media
         }
 
         /// <summary>
-        /// Gets the RGB color model equivalent of this HSV color.
+        /// Returns the RGB color model equivalent of this HSV color.
         /// </summary>
         /// <returns>The RGB equivalent color.</returns>
         public Color ToRgb()