bump v1 version to `v1.16.2`

[alejandro-vaz]

bump version on Cargo.toml for the v1 branch to v1.16.2

no other changes needed.

[alejandro-vaz]

I'm going to run a small experiment

I published this issue at 10am UTC, but no one is actually on open source at that time, so I suspect that's why it didn't get taken

I'm going to close it and open a new one exactly the same as this one, but just now, at 8pm UTC

I have the impression these kinds of "anyone take them, it's simple" issues get taken most likely in the few hours after publishing