r.colors.stddev: add keyword

		 (merge from devbr6, https://trac.osgeo.org/grass/changeset/34723)


git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34724 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.colors.stddev/r.colors.stddev

@@ -15,7 +15,7 @@
 
 #%Module
 #% description: Set color rules based on stddev from a map's mean value.
-#% keywords: raster
+#% keywords: raster, color table
 #%End
 #% option
 #% key: input