copy edit respect-user-color-scheme and renderings descriptions

Author: gordonwoodhull

src/resources/schema/cell-attributes.yml

@@ -13,7 +13,7 @@
 - name: renderings
   schema:
     arrayOf: string
-  description: "Array of rendering names"
+  description: "Array of rendering names, e.g. `[light, dark]`"
 
 - name: tags
   tags:

src/resources/schema/document-options.yml

@@ -90,11 +90,10 @@
   tags:
     formats: [$html-doc]
   description:
-    short: "Whether the `prefers-color-scheme` media query controls dark mode."
+    short: "Enables setting dark mode based on the `prefers-color-scheme` media query."
     long: |
-      Whether to use the `prefers-color-scheme` media query to determine whether to show
-      the user a dark or light page. Otherwise the author preference (order of `light`
-      and `dark` in `theme` or `brand`) determines what is shown to the user at first visit.
+      If set. Quarto reads the `prefers-color-scheme` media query to determine whether to show
+      to show the user a dark or light page. Otherwise the author preference will be shown.
 
 - name: html-math-method
   tags: