Fix #8756 - Update function help for colour functions

Author: NathanW2

resources/function_help/color_cmyk

@@ -14,4 +14,4 @@ Returns a string representation of a color based on its cyan, magenta, yellow an
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->
-     color_cmyk(100,50,0,10) &rarr; '#0073e6'</p>
+     color_cmyk(100,50,0,10) &rarr; '0,115,230'</p>

resources/function_help/color_hsl

@@ -12,4 +12,4 @@ Returns a string representation of a color based on its hue, saturation, and lig
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->
-     color_hsl(100,50,70) &rarr; '#a6d98c'</p>
+     color_hsl(100,50,70) &rarr; '166,217,140'</p>

resources/function_help/color_hsv

@@ -12,4 +12,4 @@ Returns a string representation of a color based on its hue, saturation, and val
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->
-     color_hsv(40,100,100) &rarr; '#ffaa00'</p>
+     color_hsv(40,100,100) &rarr; '255,170,0'</p>

resources/function_help/color_rgb

@@ -13,4 +13,4 @@ Returns a string representation of a color based on its red, green, and blue com
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->
-     color_rgb(255,127,0) &rarr; '#ff7f00'</p>
+     color_rgb(255,127,0) &rarr; '255,127,0'</p>

resources/function_help/ramp_color

@@ -12,7 +12,7 @@ Returns a string representing a color from a color ramp.
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->
-     ramp_color('Spectral',0.3) &rarr; '#fdbe73'</p>
+     ramp_color('Spectral',0.3) &rarr; '253,190,115,255'</p>
 
 <p><h4>Note:</h4>
 The color ramps available vary between QGIS installations.  This function