Move data in browser-compat key for two more articles (mdn#16817)

These updates had been waiting on BCD changes that have now been
merged, from mdn/browser-compat-data#16477
and mdn/browser-compat-data#16455

files/en-us/web/css/alternative_style_sheets/index.md

@@ -6,12 +6,7 @@ tags:
   - Guide
   - HTML
   - Reference
-spec-urls:
-  - https://html.spec.whatwg.org/multipage/#rel-alternate
-  - https://html.spec.whatwg.org/multipage/#the-link-is-an-alternative-stylesheet
-  - https://html.spec.whatwg.org/multipage/#attr-style-title
-  - https://html.spec.whatwg.org/multipage/#attr-meta-http-equiv-default-style
-  - https://drafts.csswg.org/cssom/#css-style-sheet-collections
+browser-compat: html.elements.link.rel.alternate_stylesheet
 ---
 {{CSSRef}}
 
@@ -59,4 +54,4 @@ Use `rel="stylesheet"` to link to the default style, and `rel="alternate stylesh
 
 ## Browser compatibility
 
-{{Compat("html.elements.link.rel.alternate_stylesheet")}}
+{{Compat}}

files/en-us/web/css/display-listitem/index.md

@@ -9,7 +9,7 @@ tags:
   - Reference
   - display-listitem
   - list-item
-spec-urls: https://drafts.csswg.org/css-display/#typedef-display-listitem
+browser-compat: css.properties.display.list-item
 ---
 {{CSSRef}}
 
@@ -50,9 +50,7 @@ A single value of `list-item` will cause the element to behave like a list item.
 
 ## Browser compatibility
 
-### Support of `list-item`
-
-{{Compat("css.properties.display.list-item", 10)}}
+{{Compat}}
 
 ## See also