LFG!
This guide assumes that you use cosmovisor to manage upgrades. If you do not use cosmovisor, please adjust some commands accordingly.
        The upgrade is scheduled for Block
        13046600. It is estimated to take place
        2 years ago. A
        countdown clock is here.
                  The governance proposal is here.
              
cd persistence
git pull
git checkout v8.1.0
make install
      # should be v8.1.0
persistenceCore version
# Should be commit b00d6a18eaf19f0b67ee3a84bc69367f7ebb56bd
persistenceCore version --long | grep commit
      mkdir -p $HOME/.persistenceCore/cosmovisor/upgrades/v8/bin
cp $HOME/go/bin/persistenceCore $HOME/.persistenceCore/cosmovisor/upgrades/v8/bin
      # should be v8.1.0
$HOME/.persistenceCore/cosmovisor/upgrades/v8/bin/persistenceCore version