[REVIEW] Fix typos in parameter tuning guide

[abc99lr]

This PR fixes the typos in the ANN benchmark parameter tuning guide regarding refine_ratio and dataset location. Specifically,

1. Default refine ratio should be 1 instead of 0

• RAFT IVF-PQ. link
• FAISS GPU. link

2. Default dataset location

• RAFT IVF-Flat. Should be mmap instead of device. link
• RAFT IVF-PQ. Should be host instead of device. link
• RAFT CAGRA. Should be mmap instead of device. link

And I think we can unify the dataset location to either mmap or host. Furthermore, to enable better copy performance and enable kernel/copy overlap, RAFT should also support pinned_host as one of the memory types. I can open a separate issue for it if people think it's reasonable.

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[cjnolet]

/ok to test

[cjnolet]

Thanks for the contribution @abc99lr. Please let us know if you'd like to be added to the triage group (so for example, we won't need to do ./okay to test each time you push a commit to your PR).

[cjnolet]

/merge

[abc99lr]

Thanks for the contribution @abc99lr. Please let us know if you'd like to be added to the triage group (so for example, we won't need to do ./okay to test each time you push a commit to your PR).

That would be great! Thanks.