Editorial: align currentcolor with CSS

It's spelled lowercase these days and as all CSS values is single quoted.

Author: annevk

source

@@ -3442,7 +3442,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><p>If <var>color</var> is failure, then return failure.</p></li>
 
      <li>
-      <p>If <var>color</var> is <code>currentColor</code>, then:</p>
+      <p>If <var>color</var> is <span>'currentcolor'</span>, then:</p>
 
       <ol>
        <li><p>If <var>element</var> is not given, then set <var>color</var> to <span>opaque
@@ -3557,8 +3557,8 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
     <ul class="brief">
      <li><dfn data-x-href="https://drafts.csswg.org/css-color/#named-color">named color</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-color/#typedef-color">&lt;color></dfn></li>
-     <li><dfn data-x-href="https://drafts.csswg.org/css-color/#valdef-color-currentcolor">currentColor</dfn></li>
      <li>The <dfn data-x-href="https://drafts.csswg.org/css-color/#the-color-property">'color'</dfn> property</li>
+     <li>The <dfn data-x-href="https://drafts.csswg.org/css-color/#valdef-color-currentcolor" id="currentcolor">'currentcolor'</dfn> value</li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-color/#opaque-black">opaque black</dfn></li>
      <li><dfn data-x-href="https://drafts.csswg.org/css-color/#transparent-black">transparent black</dfn></li>
     </ul>