message: docs: fix redirect from bad find/replace
diff: @@ -19,5 +19,5 @@ RewriteEngine On
  RewriteCond %{SERVER_PORT} 80
  RewriteRule ^(.*)$ https://superset.apache.org/$1 [R,L]
  -RewriteCond %{HTTP_HOST} ^superset.apache.org$ [NC]
  +RewriteCond %{HTTP_HOST} ^superset.incubator.apache.org$ [NC]
  RewriteRule ^(.*)$ https://superset.apache.org/$1 [R=301,L]
  