Accessibility error: Attribute cdts-exitscript-disabled not allowed on element a at this point

[j-paquette]

Found this when validating the generated exitscript html in W3C: Nu HTML Checker (https://validator.w3.org/nu/#textarea).
It returned the following error:

Attribute cdts-exitscript-disabled not allowed(https://html.spec.whatwg.org/multipage/#the-a-element) on [a] element a at this point

The accessibility rule explains that:
if a link needs to be programatically communicated as disabled, remove the href attribute (https://w3c.github.io/html-aria/#el-a)
For more details about the accessibility rules for a-tags, check here:
https://w3c.github.io/html-aria/#example-communicate-a-disabled-link-with-aria
https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-a-element

This fix will be included as part of a future release.