Updated About box to check for updates

Author: menees

src/Diff.Net/Diff.Net.csproj

@@ -9,7 +9,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Menees.Diffs.Windows.Forms" Version="4.9.3" />
+		<PackageReference Include="Menees.Diffs.Windows.Forms" Version="4.9.10" />
 	</ItemGroup>
 
 	<ItemGroup>