Fix .Date.Pages typos across the board

content/templates/ordering-and-grouping.md

@@ -209,7 +209,7 @@ also get it:
 
 {{% code file="layouts/partials/by-nested-param.html" %}}
 ```html
-{{ range (.Date.Pages.ByParam "author.last_name") }}
+{{ range (.Data.Pages.ByParam "author.last_name") }}
   <!-- ... -->
 {{ end }}
 ```

content/templates/template-debugging.md

@@ -57,7 +57,7 @@ When developing a [homepage][], what does one of the pages you're looping throug
 {{ end }}
 ```
 
-{{% note "`.Date.Pages` on the Homepage" %}}
+{{% note "`.Data.Pages` on the Homepage" %}}
 `.Data.Pages` on the homepage is equivalent to `.Site.Pages`.
 {{% /note %}}