CLDR-18059 BRS 46 Update site redirects for latest, dev (#4159)

Author: pedberg-icu

docs/site/_redirects

@@ -2,8 +2,8 @@
 # Note: See <https://developers.cloudflare.com/pages/configuration/redirects/> for docs!
 
 # redirect latest and dev pages
-/downloads/dev*  /downloads/cldr-46
-/downloads/latest* /downloads/cldr-45
+/downloads/dev*  /downloads/cldr-47
+/downloads/latest* /downloads/cldr-46
 
 # redirect old download pages [CLDR-17977]
 /index/downloads/* /downloads/:splat