feat(ipfs-docs): add scaleway in pinning services provider

[OnsagerHe]

Describe your changes

Add Scaleway pinning service to list of pinning providers

Files changed

• docs/concepts/persistence.md
• docs/how-to/work-with-pinning-services.md

What issue(s) does this address?

• https://github.com/ipfs/ipfs-docs/issues/1745

Checklist before requesting a review

• [ ] Passing the beta version of the Check Markdown links for modified files check. Action results can be viewed here.

Checklist before merging

• [ ] Passing all required checks (The beta Check Markdown links for modified files check is not required)

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