DOC: Linkcheck broken due to [SSL: CERTIFICATE_VERIFY_FAILED] in astroutils.astronomy.ohio-state.edu

[pllim]

(coordinates/velocities: line 571) broken https://astroutils.astronomy.ohio-state.edu/exofast/barycorr.html - HTTPSConnectionPool(host='astroutils.astronomy.ohio-state.edu', port=443): Max retries exceeded with url: /exofast/barycorr.html (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1000)')))

Example log: https://github.com/astropy/astropy/actions/runs/7481373307/job/20362848073

astropy/tox.ini

Lines 139 to 145 in c714978

	[testenv:linkcheck]
	changedir = docs
	description = check the links in the HTML docs
	extras = docs
	commands =
	pip freeze
	sphinx-build -b linkcheck . _build/html {posargs:-W}

[pllim]

@rendinam , do you know someone who can fix this? Thanks!