some sites are down

https://aldernea.neocities.org/inicio 404
https://augustaquarium.neocities.org/ 404
https://buster.nekoweb.org/ 404
https://duckyducky.neocities.org/ 404
https://freakysunshine.neocities.org/mainpage 404
https://myrdin.is-a.dev/projects/blinkies-and-webring/ HTTPSConnectionPool(host='myrdin.is-a.dev', port=443): Max retries exceeded with url: /projects/blinkies-and-webring/ (Caused by SSLError(SSLCertVerificationError(1, "[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'myrdin.is-a.dev'. (_ssl.c:1028)")))
https://robynnesnest.click/ HTTPSConnectionPool(host='robynnesnest.click', port=443): Max retries exceeded with url: / (Caused by NameResolutionError(": Failed to resolve 'robynnesnest.click' ([Errno 11001] getaddrinfo failed)"))
https://sectorfive.win/ 502
https://slayersalem.neocities.org/ 404
https://venusinfoxfurs.neocities.org/ 404
https://yetiuard.wtf/ HTTPSConnectionPool(host='yetiuard.wtf', port=443): Max retries exceeded with url: / (Caused by NameResolutionError(": Failed to resolve 'yetiuard.wtf' ([Errno 11001] getaddrinfo failed)"))

Start by checking how the listed site URLs are represented in the repository and verify their current responses. Determine whether each entry should be updated or removed, then confirm that the webring no longer points to the reported unavailable sites.

Written by the indexing model from the issue text.