fix(deps): update russh monorepo to 0.42.0

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
russh	dependencies	minor	0.40.2 -> 0.42.0
russh-keys	dependencies	minor	0.40.1 -> 0.42.0

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Release Notes

warp-tech/russh (russh)

v0.42.0

Compare Source

Changes

• 2ce82f2: Support for NIST P-521 public keys (akeamc) #​230
• 8f6af5e: Support for diffie-hellman-group16-sha512 hex (Brendon Ho) #​233
• 273fd88: Add russh::server::run_on_socket to facilitate dropping privileges immediately after socket binding (Samuel Ainsworth) #​231
• be6f5be: implement Ord, PartialOrd for ChannelId (Sherlock Holo) #​238

Fixes

• b9dce87: Improve keepalive and inactivity timers (Milo Mirate) #​214
• 1541fe5: Analogous keepalive fixes to the client module (Samuel Ainsworth) #​243
• bd13e95: Avert the race between sending data and sending EOF (Milo Mirate) #​222
• 44a2392: server/encrypted.rs: respect proceed_with_methods in "none" and "password" authentication methods (Samuel Ainsworth) #​241
• 42c98a6: fixed #​227 - only advertise host key algos for host keys present in server::Config

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