`jemallocator` and `jemallocator-sys` crates are same as the `tikv-*`
versions and these aliases were maintained for historical reasons, based
on crates.io documentation. For newer projects, it is recommended to use
the `tikv-` versions of the crate. Even though Servo is not a new
project, it makes sense to switch to the newer version for the sake of
clarity.
Also, more importantly, `tikv-jemallocator` has new release (0.6.0)
which includes a fix for #32720. There doesn't seem to be a
corresponding version publised for the `jemallocator` crate.
Fixes#32720
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>