https://html.spec.whatwg.org/multipage/introduction.html#suggested-reading
Web Content Accessibility Guidelines (WCAG) 2.0 [WCAG]
suggest updating to 2.1 https://www.w3.org/TR/WCAG/
Thanks! I think we should probably use https://w3c.github.io/wcag/guidelines/ to match our general policy of referring to latest Editor's Drafts. Then we can remove the version number entirely.
Can I work on this issue?
Yes, provided you can sign https://participate.whatwg.org/agreement you should feel free to submit a PR, no need to ask.
@annevk Yes I have signed.
Is there any discussion channel where I need to join for asking the query?
I'm not entirely sure what you mean, but https://whatwg.org/irc is a place where some of us hang out and you could ask questions. You can also ask them here though if there is something that is unclear.
@stevefaulkner I have a query so that I can understand what exactly we have to do. What I understood is that we have to write 2.1 where ever 2.0 written. Am I right?
Screenshot taken from https://html.spec.whatwg.org/multipage/introduction.html#suggested-reading

That and https://html.spec.whatwg.org/multipage/references.html#refsWCAG should reference https://w3c.github.io/wcag/guidelines/.
@annevk Can you help me figure out where this file is located. I am unable to locate the file.
@arsalanhub the file named source contains the source of the HTML Standard.
If I'm guessing right @annevk, what's meant to be done here is changing
Yes.
@annevk
I saw this Web Content Accessibility Guidelines (WCAG) 2.0 three times in the source file and had to change it to 2.1.
is that what's expect to be done?
Yeah, that sounds right. Twice right there and once in the reference section.
Most helpful comment
Thanks! I think we should probably use https://w3c.github.io/wcag/guidelines/ to match our general policy of referring to latest Editor's Drafts. Then we can remove the version number entirely.