[css-writing-modes] Fix typo for glyph-orientation-vertical

Author: kojiishi

css-writing-modes/Overview.bs

@@ -1368,7 +1368,7 @@ Mixed Vertical Orientations</h4>
 Obsolete: the SVG1.1 'glyph-orientation-vertical' property</h4>
 
   <pre class='propdef'>
-  Name: glyph-orientation-horizontal
+  Name: glyph-orientation-vertical
   Value: auto | 0deg | 90deg
   Initial: n/a
   Applies to: n/a
@@ -1382,7 +1382,7 @@ Obsolete: the SVG1.1 'glyph-orientation-vertical' property</h4>
 
   Some SVG user agents will need to process documents containing
   the obsolete SVG 'glyph-orientation-vertical' property.
-  It is recommended that such UAs treat 'glyph-orientation-horizontal'
+  It is recommended that such UAs treat 'glyph-orientation-vertical'
   as a shorthand alias of 'text-orientation' as follows:
 
   <table class="data">