8GB recommended limit can be lifted

Considering the following article by Alibaba:
https://www.cncf.io/blog/2019/05/09/performance-optimization-of-etcd-in-web-scale-data-scenario/
And the related merged pull request that solves the size limit bottlenecks
https://github.com/etcd-io/bbolt/pull/141

I feel like this guide page : https://etcd.io/docs/v3.5/dev-guide/limit/
for system limits needs to updated to reflect the changed capabilities.