Red Hat should always be spelled as two words.

Link: <https://www.redhat.com/en/about/brand/new-brand/details>
Link: <https://www.redhat.com/en/about/brand/standards/trademarks>
Cc: Artem Konev <artem.konev@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Author: ac000

README.md

@@ -45,7 +45,7 @@ For a description of image tags, see the
 [docs](https://unit.nginx.org/installation/#docker-images).
 
 
-### Amazon Linux, Fedora, RedHat
+### Amazon Linux, Fedora, Red Hat
 
 ``` console
 $ wget https://raw.githubusercontent.com/nginx/unit/master/tools/setup-unit && chmod +x setup-unit