[css-navigation-1] Update metadata to be a CSSWG ED.

This is per the resolution in:
w3c#12594 (comment)

Author: dbaron

css-navigation-1/Overview.bs

@@ -1,17 +1,16 @@
 <pre class="metadata">
 Title: CSS Route Matching
-Status: UD
+Status: ED
 Work Status: Exploring
-Shortname: css-route-matching
+Shortname: css-navigation
 Org: w3c
 Level: 1
-Repository: WICG/declarative-route-matching
+Group: csswg
+ED: https://drafts.csswg.org/css-navigation-1/
 !Issue Tracking: <a href="https://github.com/w3c/csswg-drafts/issues/12594">w3c/csswg-drafts#12594</a>
-ED: https://wicg.github.io/declarative-partial-updates/css-route-matching/
 Editor: L. David Baron, Google https://www.google.com/, https://dbaron.org/, w3cid 15393
 Editor: Noam Rosenthal, Google https://www.google.com/, w3cid 121539
-Abstract: This module contains conditional CSS rules for styling based on routes
-        declared in HTML.  This allows styles to be conditioned on the current URL
+Abstract: This module contains conditional CSS rules for styling conditioned on the current URL
         or conditioned on the status of navigating between particular URLs.
 </pre>
 <!-- for now using Org: w3c rather than Group: csswg because the latter forces an incorrect issue tracking link, overriding Repository -->