[css-color-5] fix typos

Author: romainmenke

css-color-5/Overview.bs

@@ -1169,7 +1169,7 @@ the allowed [=channel keywords=] are:
 	that corresponds to the [=origin color's=] CIE Lightness
 	after <a href="#required-conversion">conversion, if required</a>, to CIE Lab
 * <dfn value for="lab()">a</dfn> and <dfn value for="lab()">b</dfn> are <<number>>s
-	that correspond to the [=origin color's=] CIELab a and b axes
+	that correspond to the [=origin color's=] CIE Lab a and b axes
 	after <a href="#required-conversion">conversion, if required</a>, to CIE Lab
 * <dfn value for="lab()">alpha</dfn> is a <<number>> that corresponds to the [=origin color's=] alpha transparency
 
@@ -1239,7 +1239,7 @@ Within a [=relative color=] syntax ''lch()'' function,
 the allowed [=channel keywords=] are:
 
 * <dfn value for="lch()">l</dfn> is a <<number>>
-	that corresponds to the [=origin color's=] CIE Lightness
+	that corresponds to the [=origin color's=] LCH Lightness
 	after <a href="#required-conversion">conversion, if required</a>, to CIE LCH
 * <dfn value for="lch()">c</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] LCH chroma
@@ -1372,7 +1372,7 @@ Within a [=relative color=] syntax ''oklch()'' function,
 the allowed [=channel keywords=] are:
 
 * <dfn value for="oklch()">l</dfn> is a  <<number>>
-	that corresponds to the [=origin color's=] Oklab Lightness
+	that corresponds to the [=origin color's=] Oklch Lightness
 	after <a href="#required-conversion">conversion, if required</a>, to Oklch
 * <dfn value for="oklch()">c</dfn> is a  <<number>>
 	that corresponds to the [=origin color's=] Oklch chroma