Add links to CSSWG issue

Author: mfreed7

site/src/pages/components/interest-invokers.explainer.mdx

@@ -164,7 +164,7 @@ Many different options for providing touchscreen support were discussed and even
 
 #### The `::interest-button` pseudo element
 
-This is "Option 3.5" in the [Touchscreen options](#touchscreen-options) section. Adding an item to the long-press context menu meets the use case of ensuring all users have access to hovercard content. However, it is a bit more difficult to discover and use. In some cases, developers might want to provide a more visible way to show the user that there is more content to access. Importantly, in other cases, developers (or more often *designers*) explicitly do not want this - they want to keep an uncluttered page layout without extra affordances.
+This is "Option 3.5" in the [Touchscreen options](#touchscreen-options) section, and is discussed in [CSSWG issue 12437](https://github.com/w3c/csswg-drafts/issues/12437). Adding an item to the long-press context menu meets the use case of ensuring all users have access to hovercard content. However, it is a bit more difficult to discover and use. In some cases, developers might want to provide a more visible way to show the user that there is more content to access. Importantly, in other cases, developers (or more often *designers*) explicitly do not want this - they want to keep an uncluttered page layout without extra affordances.
 
 In the case that the developer wants to add additional visibility, they can opt in to an addition button/icon via the `::interest-button` pseudo element:
 
@@ -624,3 +624,4 @@ This section links to all of the relevant discussions and issues related to `int
 - [CSSWG discussion of the pseudo classes](https://github.com/w3c/csswg-drafts/issues/12154)
 - [(OpenUI) Don't use interestfor for modal dialogs](https://github.com/openui/open-ui/issues/1093)
 - [(OpenUI) We don't need an interestaction attribute](https://github.com/openui/open-ui/issues/1064)
+- [The ::interest-button pseudo element](https://github.com/w3c/csswg-drafts/issues/12437)