Update links for old trace.wisc.edu resources

[patrickhlauke]

• point to new sources for PEAT and "Information about Photosensitive Seizure Disorders" on trace.umd.edu
• point to archive.org stored versions of the contrast ratio examples
• remove links to the "About Decibels" article

Note that this still leaves lots of links too trace.wisc.edu/wcag_wiki which I can't seem to locate a new location for

[patrickhlauke]

copying in @GreggVan who might know if resources (like the "About Decibels" which I removed, and the wcag_wiki ones, which I've left but are 404ing) are on some new/better location

[GreggVan]

Ah About decibels is now in the DeveloperSpace https://ds.gpii.net/content/about-decibels-db <https://ds.gpii.net/content/about-decibels-db> And Trace is now at University of Maryland (which is why the URL at University of Wisconsin-Madison broke) https://trace.umd.edu <https://trace.umd.edu/> gregg ——————————— Professor, University of Maryland, College Park Founder and Director Emeritus , Trace R&D Center, UMDCo-Founder Raising the Floor. http://raisingthefloor.org The Global Public Inclusive Infrastructure (GPII) http://GPII.net The Morphic project https://morphic.org

…

On Nov 9, 2021, at 7:54 AM, Patrick H. Lauke ***@***.***> wrote: copying in @GreggVan <https://github.com/GreggVan> who might know if resources (like the "About Decibels" which I removed, and the wcag_wiki ones, which I've left but are 404ing) are on some new/better location — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2132 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACNGDXRGBTZIFTWZAF2QTEDULEKYTANCNFSM5HVHADQQ>. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[alastc]

@patrickhlauke - thanks for this. I've updated the decibel links and merged.

BTW, no need to update anything in an XML file, we don't use those anymore.