target folder fix

Author: vikulin

contrib/msi/build-msi.sh

@@ -287,7 +287,7 @@ cat > wix.xml << EOF
              Description="RiV-mesh is IoT E2E encrypted network"
              Directory="DesktopFolder"
              Target="[MeshInstallFolder]mesh-ui.exe"
-             WorkingDirectory="${MeshInstallFolder}"/>
+             WorkingDirectory="MeshInstallFolder"/>
         <RegistryValue Root="HKCU" Key="Software\RiV-chain\RiV-mesh" Name="installed" Type="integer" Value="1" KeyPath="yes" />
      </Component>