Update man pages

man/catimg.1

@@ -26,6 +26,9 @@ Specify the amount of loops that catimg should repeat a GIF. A value of 1 means
 \fB\-r\fR RESOLUTION
 Possible values 1 or 2. Force the resolution of the image. By default catimg will check if rendering in higher resolution is possible and do so or use the lower one.
 
+\fB\-c\fR
+Convert colors to a restricted palette. This is useful when terminal only support a limited set of colors. This transformation should be more accurate than the one performed by the terminal.
+
 .SH BUGS
 Please report any bugs to https://github.com/posva/catimg/issues.