Update the benchmarks results

[LifeIsStrange]

They were in 2018 (~2.5 years ago) so it is important to see how this has evolved.
Also the reproduced result link is broken
https://nextjournal.com/sdanisch/fastr-benchmark

Ideally the benchmarks would be done on the latest openjdk 16 (but turning on parallel GC instead of G1 would be fair)

[Akirathan]

Hello @LifeIsStrange, the new results are located here https://www.graalvm.org/r/ - measured on GraalVM 21.2.0. They are new measurements from the same functions and packages described at https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb. The reproducibility is a bit tricky, though, as we do not have approvals to publish certain packages used in the measurements.