Update Redis documentation (5.0.0)

lib/docs/filters/redis/entries.rb

@@ -21,7 +21,7 @@ module Docs
         when 'PFADD'            then 'HyperLogLog'
         when 'CLUSTER ADDSLOTS' then 'Cluster'
         when 'GEOADD'           then 'Geo'
-        when 'XADD'             then 'Stream'
+        when 'XACK'             then 'Stream'
         else 'Miscellaneous'
         end
       end

lib/docs/scrapers/redis.rb

@@ -1,7 +1,7 @@
 module Docs
   class Redis < UrlScraper
     self.type = 'redis'
-    self.release = '4.0.11'
+    self.release = '5.0.0'
     self.base_url = 'https://redis.io/commands'
     self.links = {
       home: 'https://redis.io/',