Update archive.html to support url correction from http to https

[segun-codes]

Fixes #1262 (<=== Add issue number here)

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[segun-codes]

Hi @jywarren, this PR is now ready for your kind review. Many thanks!

Note: This PR is based on your last suggestion to me on https://github.com/publiclab/Leaflet.DistortableImage/pull/1232 that I could provide functionality to replace http with https in user-supplied URLs on the welcomeModal.

[segun-codes]

Hi @jywarren @TildaDares, kindly review this PR. Many thanks!

[jywarren]

Hi, this looks good. I still think inline comments would be helpful to show exactly which URL format is handled by each code block. But this is good enough to merge, thank you very much!

[jywarren]

Maybe such comments could be added as an FTO!

[jywarren]

Great work, thank you!!

[segun-codes]

Great work, thank you!!

Hi @jywarren, many thanks!

[segun-codes]

Maybe such comments could be added as an FTO!

Okay, nice idea.