[css-spatial-nav-1] Rename slug in metadata

Author: tabatkins

css-spatial-nav-1/Overview.bs

@@ -1,12 +1,12 @@
 <pre class='metadata'>
 Title: CSS Spatial Navigation Module Level 1
-Shortname: css-nav
+Shortname: css-spatial-nav
 Level: 1
 Status: ED
 Work Status: exploring
 Group: csswg
 TR: https://www.w3.org/TR/css-nav-1/
-ED: https://drafts.csswg.org/css-nav-1/
+ED: https://drafts.csswg.org/css-spatial-nav-1/
 Previous Version: https://www.w3.org/TR/2019/WD-css-nav-1-20190423/
 Previous Version: https://www.w3.org/TR/2019/WD-css-nav-1-20191126/
 Editor: Jihye Hong, LG Electronics, jh.hong@lge.com, w3cid 79168