website: correct link to aws_route53_zone data source

This data source originally had a different name but was renamed during code review.

The docs link was missed during that renaming.

This fixes hashicorp#10972.

Author: apparentlymart

website/source/layouts/aws.erb

@@ -50,8 +50,8 @@
                         <li<%= sidebar_current("docs-aws-datasource-elb-service-account") %>>
                             <a href="/docs/providers/aws/d/elb_service_account.html">aws_elb_service_account</a>
                         </li>
-                        <li<%= sidebar_current("docs-aws-datasource-hosted-zone") %>>
-                          <a href="/docs/providers/aws/d/hosted_zone.html">aws_hosted_zone</a>
+                        <li<%= sidebar_current("docs-aws-datasource-route53-zone") %>>
+                          <a href="/docs/providers/aws/d/route53_zone.html">aws_route53_zone</a>
                         </li>
                         <li<%= sidebar_current("docs-aws-datasource-iam-account-alias") %>>
                             <a href="/docs/providers/aws/d/iam_account_alias.html">aws_iam_account_alias</a>