Link checker is failing on NOAA homepage

[brian-rose]

Recently the nightly link check started failing with

403 Client Error: Forbidden for url: https://www.noaa.gov/

This looks to me like the same issue we encountered in Foundations with certain websites rejecting the sphinx link-checker, see here: https://github.com/ProjectPythia/pythia-foundations/issues/260 https://github.com/sphinx-doc/sphinx/issues/10343 https://github.com/ProjectPythia/pythia-foundations/pull/262

Two possible workarounds:

• skip the link check for this site only, by adding "https://www.noaa.gov" to the linkcheck_ignore: line in the config file
• Run a valid link check for this site by "spoofing" a user agent with linkcheck_request_headers: as we did in Foundations https://github.com/ProjectPythia/pythia-foundations/pull/262