[SPEC] Update Boost artifact URL to archives.boost.io

[pl4nty]

This pull request updates Boost artifact URL(s) from boostorg.jfrog.io/artifactory/main/release to archives.boost.io/release.

Boost have changed to a new download provider, and the old JFrog URLs are no longer available: boostorg/boost#996

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[dcasota]

@pl4nty afaik the change isn't triggered without updating e.g. the release to 2%{?dist} for same version 1.80.0 in the spec file as well.

[pl4nty]

@dcasota thanks! I've updated the release and changelog

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