Hi,
sorry for issues – this seems pretty much related to your server configuration, which seems to be outdated (insecure configurations have been removed from my server lately) – can you please ask your hoster to have a look? especially if SNI support is enabled?
As a workaround, please download the latest package and overwrite the files manually.
best,
Robert
PS: please use the pro helpdesk next time, as wordpress.org actually is for free support only. thx.
FYI – I added a workaround on my server so that connections are possible for updates even if configuration is incomplete on the server…