This has nothing to do with this integration, it's just one of several possible ways to publish your CPU temperature to Home Assistant.
You should use this as an example and adjust to your use case.
There will be no support for issues with this alternative.
apt-get install xsensors
nano /usr/temp_ha_post
#! /bin/bash
url1=http://10.10.10.xxx:8123/api/states/sensor.proxmox_temperatura
token1=xxxxx
i=1
sensors | grep -e "°C" | while read line; do
temp=$(echo $line | awk -F "+" '{ print $2 }' | awk -F "." '{ print $1 }');
url1a=$url1'_'$i;
curl -X POST -H "Authorization: Bearer $token1" -H 'Content-type: application/json' --data "{\"state\":\"$temp\",\"attributes\": {\"friendly_name\":\"Temperatura Proxmox\",\"icon\":\"mdi:cpu-64-bit\",\"state_class\":\"measurement\",\"unit_of_measurement\":\"°C\",\"device_class\":\"temperature\"}}" $url1a;
done
chmod +x /usr/temp_ha_post
/usr/temp_ha_post
crontab -e
*/1 * * * * /usr/temp_ha_post
services cron restart