Hello, since there is no solution yet, I had to do a procedure so that Nessus no longer finds the vulnerability:
In the path "/usr/lib/python3/dist-packages" I renamed the certifi and urllib3 folders to certifi.OLD and urllib3.OLD.
Apparently Proxmox does not use them and so I had no impact. When I perform a new upgrade I will return to the correct names and check if they are updated.