[cdist.cfg.skeleton] Update colored_output documentation based on cdist(1)

configuration/cdist.cfg.skeleton

@@ -14,11 +14,12 @@
 # cache_path_pattern = %h
 #
 # colored_output
-#     Use a colored output for different log levels.
-#     It can be a boolean or 'auto' (default) which enables this feature if
-#     stdout is a tty and disables it otherwise.
-#     Colored output is always disabled if the NO_COLOR environment variable is
-#     defined (https://no-color.org/).
+#     Colorize cdist's output. If enabled, cdist will use different colors for
+#     different log levels.
+#     Recognized values are 'yes'/'no', 'on'/'off', 'true'/'false', '1'/'0',
+#     and 'auto'
+#     If the value is 'auto', colored output is enabled if stdout is a TTY
+#     unless the NO_COLOR (https://no-color.org/) environment variable is defined.
 # colored_output = auto
 #
 # conf_dir