Fix "store-data" tutorial links

[BigLep]

Looking at https://github.com/filecoin-project/lotus-docs/actions/runs/15535039379/job/43731983737?pr=804 there is report of these links being broken:

https://lotus.filecoin.io/tutorials/store-and-retrieve/store-data/#find-a-storage-provider-via-filecoin-plus
https://lotus.filecoin.io/tutorials/lotus/store-and-retrieve/store-data

I can confirm neither of these URLs works. Hitting them gives:

My quick timebox to investigate this further ran out so am backlogging for now.