Update docs to correct the default sheenColor

 * Docs stated it was 0xfffff, but it's actually 0x000000
 * Fixes mrdoob#26757

Author: Ameobea

docs/api/ar/materials/MeshPhysicalMaterial.html

@@ -186,7 +186,7 @@ <h3>[property:Texture sheenRoughnessMap]</h3>
 		</p>
 
 		<h3>[property:Color sheenColor]</h3>
-		<p>لون اللمعان. الافتراضي هو `0xffffff`، أبيض.</p>
+		<p>لون اللمعان. الافتراضي هو `0x000000`، أسود.</p>
 
 		<h3>[property:Texture sheenColorMap]</h3>
 		<p>

docs/api/en/materials/MeshPhysicalMaterial.html

@@ -227,7 +227,7 @@ <h3>[property:Texture sheenRoughnessMap]</h3>
 		</p>
 
 		<h3>[property:Color sheenColor]</h3>
-		<p>The sheen tint. Default is `0xffffff`, white.</p>
+		<p>The sheen tint. Default is `0x000000`, black.</p>
 
 		<h3>[property:Texture sheenColorMap]</h3>
 		<p>

docs/api/fr/materials/MeshPhysicalMaterial.html

@@ -161,7 +161,7 @@ <h3>[property:Texture sheenRoughnessMap]</h3>
 
 		<h3>[property:Color sheenColor]</h3>
 		<p>
-			La teinte brillante. La valeur par défaut est `0xffffff`, white.
+			La teinte brillante. La valeur par défaut est `0x000000`, noire.
 		</p>
 
 		<h3>[property:Texture sheenColorMap]</h3>

docs/api/it/materials/MeshPhysicalMaterial.html

@@ -166,7 +166,7 @@ <h3>[property:Texture sheenRoughnessMap]</h3>
 
 		<h3>[property:Color sheenColor]</h3>
 		<p>
-			La tinta brillante. Il valore predefinito è `0xffffff`, bianco.
+			La tinta brillante. Il valore predefinito è `0x000000`, nera.
 		</p>
 
 		<h3>[property:Texture sheenColorMap]</h3>

docs/api/zh/materials/MeshPhysicalMaterial.html

@@ -149,7 +149,7 @@ <h3>[property:Texture sheenRoughnessMap]</h3>
 
 		<h3>[property:Color sheenColor]</h3>
 		<p>
-			光泽颜色，默认为*0xffffff*白色。
+			光泽颜色，默认为*0x000000*黑色。
 		</p>
 
 		<h3>[property:Texture sheenColorMap]</h3>