Remove lite cyan color for http header

While we are not sure yet how we deal with "other" colors and different
backgrounds users can have, I'll remove the light cyan here until we
settle on a standard. (other=not yellow,reds,brown,greens)

testssl.sh

@@ -3223,7 +3223,7 @@ run_security_headers() {
                case "$svrty" in
                     OK) pr_svrty_good "$header" ;;
                     LOW) pr_svrty_low "$header" ;;
-                    INFO) pr_litecyan "$header" ;;
+                    INFO) out "$header" ;;
                esac
                # Include $header when determining where to insert line breaks, but print $header
                # separately.