[cssom] Editorial: fix MARGIN_RULE/NAMESPACE_RULE constants. Fixes https://www.w3.org/Bugs/Public/show_bug.cgi?id=24236

Author: zcorpan

cssom/Overview.bs

@@ -1821,9 +1821,9 @@ The <dfn attribute for=CSSRule>type</dfn> attribute must return the CSS rule typ
  <dd>Return <dfn const for=CSSRule>FONT_FACE_RULE</dfn> (numeric value 5).
  <dt>If the object is a {{CSSPageRule}}
  <dd>Return <dfn const for=CSSRule>PAGE_RULE</dfn> (numeric value 6).
- <dt>If the object is a {{CSSNamespaceRule}}
- <dd>Return <dfn const for=CSSRule>MARGIN_RULE</dfn> (numeric value 9).
  <dt>If the object is a {{CSSMarginRule}}
+ <dd>Return <dfn const for=CSSRule>MARGIN_RULE</dfn> (numeric value 9).
+ <dt>If the object is a {{CSSNamespaceRule}}
  <dd>Return <dfn const for=CSSRule>NAMESPACE_RULE</dfn> (numeric value 10).
  <dt>Otherwise
  <dd>Return a value defined on the <a href="http://wiki.csswg.org/spec/cssom-constants">CSSOM Constants</a> wiki page.
@@ -3233,6 +3233,7 @@ Morten Stenshorne,
 Ms2ger,
 Øyvind Stenhaug,
 Peter Sloetjes,
+Philip Jägenstedt,
 Philip Taylor,
 Robert O'Callahan,
 Simon Sapin,