[ernado]

Documentation for gotd/td v0.165.0 (https://github.com/gotd/td/releases/tag/v0.165.0):

• authentication/sessions.md: what a session holds (other DC keys, key age, server time offset, self id, ErrVersionUnsupported), logging out (Client.LogOut).
• helpers/peers.md: in-memory cache by default, NoopCache, username normalization and TTL, the manager as access hasher.
• helpers/updates-recovery.md: access hashes, failed differences (backoff, PERSISTENT_TIMESTAMP_*, Config.Clock).
• advanced/long-running.md: pings and salts, clock skew, reconnects and server sessions.
• helpers/uploading-files.md, basics/sending-messages.md: default MIME type and file name of uploaded documents.

Merge before the v0.165.0 post (it links to new sections). yarn build passes with no warnings.