cargo update

compiler & tools dependencies:
     Locking 3 packages to latest compatible versions
    Updating ipc-channel v0.20.0 -> v0.20.1
    Updating rand v0.9.1 -> v0.9.2
    Updating redox_syscall v0.5.13 -> v0.5.16
note: pass `--verbose` to see 37 unchanged dependencies behind latest

library dependencies:
     Locking 1 package to latest compatible version
    Updating rand v0.9.1 -> v0.9.2
note: pass `--verbose` to see 2 unchanged dependencies behind latest

rustbook dependencies:
     Locking 1 package to latest compatible version
    Updating redox_syscall v0.5.13 -> v0.5.16