Update kavita.sh

fixes https://github.com/tteck/Proxmox/issues/2022

ct/kavita.sh

@@ -55,7 +55,7 @@ header_info
 if [[ ! -d /opt/Kavita ]]; then msg_error "No ${APP} Installation Found!"; exit; fi
 msg_info "Updating $APP LXC"
 systemctl stop kavita
-RELEASE=$(curl -s https://api.github.com/repos/Kareadita/Kavita/releases/latest | grep "tag_name" | awk '{print substr($2, 2, l>
+RELEASE=$(curl -s https://api.github.com/repos/Kareadita/Kavita/releases/latest | grep "tag_name" | awk '{print substr($2, 2, length($2)-3) }')
 tar -xvzf <(curl -fsSL https://github.com/Kareadita/Kavita/releases/download/$RELEASE/kavita-linux-x64.tar.gz) &>/dev/null
 rm -rf Kavita/config
 cp -r Kavita/* /opt/Kavita