build(deps): bump paramiko from 4.0.0 to 5.0.0

[dependabot]

Bumps paramiko from 4.0.0 to 5.0.0.

Commits

• 710cc5c What's a few weeks between friends?
• ea93c59 Fix up Ed25519Key so it has non-erroring repr() during fatal errors
• 5b90ef9 ruff/isort
• f3864b6 Changelog fixes
• acd4bc1 Replace hardcoded PEM format in PKey.write* with new parameter
• 6fa1556 Bump group-exchange kex min_bits to 2048
• eb87ad3 Fix some tests that were incorrectly passing
• 1ecc933 Remove GSSAPI support :(
• 9bf5fca Remove SHA1-based (non-GSS) kex methods
• b8f75c7 Lintin' ain't easy
• Additional commits viewable in compare view

[dependabot]

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[Lay007]

All current CI checks are green, but this is a production major update (paramiko 4.x → 5.x), and the course CI does not establish a real SSH/SFTP session with the Zynq board.

Before merging, the remaining compatibility gate should exercise the APIs used by validate_clean_boot_overlay.py: SSHClient, host-key policy setup, connect, exec_command, open_sftp, upload/download, and close. A short board smoke run should also verify one command, one upload, and one download against the target ADI Linux image.

Keeping this PR open is intentional: passing import/unit checks is not sufficient evidence for the hardware deployment path.