[css-color] update chenges sections for move of interpolation section

Author: svgeesus

css-color-4/Overview.bs

@@ -4732,7 +4732,18 @@ Changes</h2>
 </h3>
 
 <ul>
+	<!-- moved from Color 5 -->
+	<li>Define premultiplied alpha interpolation</li>
+	<li>Start to address interpolation to and from currentColor</li>
+	<li>Define hue interpolation with NaN</li>
+	<li>Generalize color interpolation</li>
+	<li>Define interpolation to be in Lab, with override to LCG</li>
+	<li>Corrections to hue interpolation</li>
+	<li>defined hue angle interpolation</li>
+	<li>added interpolation section</li>
+
 	<!-- to 18 Jan 2021 -->
+
 	<li>Clarified fallback procedure for the color() function – first valid in-gamut color, else first valid color which is then gamut maped, else transparent black</li>
 	<li>Clarified difference betwen opacity property and colors with opacity, notably for rendering overlapping text glyphs</li>
 	<li>Added sample (but verified correct) code for ΔE2000</li>

css-color-5/Overview.bs

@@ -767,13 +767,9 @@ Changes {#changes}
 <h3 id="changes-20200303">Since the <a href="https://www.w3.org/TR/2020/WD-css-color-5-20200303/">FPWD of 10 June 2020</a></h3>
 
 <ul>
+	<!-- removed interpolation section changes, added to Color 4 -->
 	<!-- to 5 Jan 2021 -->
 	<li>Link to CSS 4 definition of color serialization</li>
-	<li>Define premultiplied alpha interpolation</li>
-	<li>Start to address interpolation to and from currentColor</li>
-	<li>Define hue interpolation with NaN</li>
-	<li>Generalize color interpolation</li>
-	<li>Define interpolation to be in Lab, with override to LCG</li>
 	<li>Added separate section for colorspaces</li>
 	<li>Updated color-adjust example</li>
 	<li>Added explanatory diagrams</li>
@@ -782,12 +778,9 @@ Changes {#changes}
 	<li>Allow percentages for adjusters</li>
 	<li>Link fixes</li>
 	<li>Updated color-mix grammar, allowing adjusters, add alpha adjuster</li>
-	<li>Corrections to hue interpolation</li>
 	<li>Corrections to some examples</li>
 	<li>Updated Security and Privacy section</li>
 	<!-- to 11 June 2020 -->
-	<li>added interpolation section</li>
-	<li>defined hue angle interpolation</li>
 	<li>added vs keyword to color-contrast</li>
 	<li>added xyz adjuster to grammar</li>
 	<li>added hue adjuster keywords</li>