Bump Rust toolchain to 1.85

[Mallets]

Depends on:

• Bump to v2.1.1 p-avital/validated-struct-macros-rs#3
• Bump Rust toolchain to 1.85 zenoh#1803 --> revert zenoh branch to main

[github-actions]

PR missing one of the required labels: {'documentation', 'dependencies', 'breaking-change', 'internal', 'enhancement', 'new feature', 'bug'}