update native urls secn in ipfs in the browser

[bumblefudge]

Describe your changes

Renamed "Native URLs" to "IPFS-Scheme URLs" after discussion with some core folks in the filecoin slack earlier today.

Files changed

docs/how-to/address-ipfs-on-web.md

What issue(s) does this address?

Just aligns terminology with practice and with browser-API terminology (topical because these specs are being linked to from applications for standards purposes)

note: I snuck a duplicate fragment-anchor into the heading so that old links directly to the renamed section would still work

Does this update depend on any other PRs?

nope

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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