docs: update to Nomad 0.10.4 in Vagrantfile

demo/vagrant/Vagrantfile

@@ -25,7 +25,7 @@ sudo docker --version
 sudo apt-get install unzip curl vim -y
 
 echo "Installing Nomad..."
-NOMAD_VERSION=0.10.3
+NOMAD_VERSION=0.10.4
 cd /tmp/
 curl -sSL https://releases.hashicorp.com/nomad/${NOMAD_VERSION}/nomad_${NOMAD_VERSION}_linux_amd64.zip -o nomad.zip
 unzip nomad.zip