Update documentation

Author: joniles

mkdocs/docs/howto-dotnet.md

@@ -37,8 +37,8 @@ your project file and include the following lines:
 
 ```xml
 <ItemGroup>
-  <PackageReference Include="IKVM.Maven.Sdk" Version="1.6.9" />
-  <MavenReference Include="net.sf.mpxj:mpxj" Version="13.0.0"/>
+  <PackageReference Include="IKVM.Maven.Sdk" Version="1.8.2" />
+  <MavenReference Include="net.sf.mpxj:mpxj" Version="13.7.0"/>
 </ItemGroup>
 ```