refactor: SvgImageException message referencing the Source as well as…

… the ResourceId, in case the ResourceId is unavailable.

XamExtensionsSvg/SvgImage.cs

@@ -168,7 +168,7 @@ private void CanvasViewOnPaintSurface(object sender, SKPaintSurfaceEventArgs arg
             }
             catch (Exception ex)
             {
-                throw new SvgImageException($"Error while trying to load Resource Id {resourceId}.", ex);
+                throw new SvgImageException($"Error while trying to load Resource {resourceId}/{Source}.", ex);
             }
         }