v3.5.17 Christmas break release 2024

What's Changed

• Release-doc updates etc. for 3.5.16 by @willend in #1800
• Update README.md by @willend in #1801
• Post 3.5.16 minor fixes by @willend in #1802
• Correct dumb typo by @willend in #1803
• Post 3.5.16 minor fixes by @willend in #1804
• Post 3.5.16 minor fixes by @willend in #1805
• Ditch binder links by @willend in #1806
• Align with main by @willend in #1810
• Post 3.5.16 minor Union fixes + NeXus x wide MPI by @willend in #1811

Full Changelog: v3.5.16...v3.5.17