[css-anchor-position][editorial] fix linking

Author: tabatkins

css-anchor-position-1/Overview.bs

@@ -197,7 +197,7 @@ for a given positioned element.
 	which sets the implicit anchor element.
 
 [=Implicit anchor elements=] can be referenced
-with the ''auto'' keyword in 'position-anchor',
+with the ''position-anchor/auto'' keyword in 'position-anchor',
 or by omitting the anchor reference in [=anchor functions=].
 
 [=Pseudo-elements=]
@@ -324,7 +324,7 @@ given an <dfn>anchor specifier</dfn>,
 which is either a <<dashed-ident>>
 (and a [=tree-scoped reference=])
 that should match an 'anchor-name' value elsewhere on the page,
-or the keyword ''auto'',
+or the keyword ''position-anchor/auto'',
 or nothing (a missing specifier).
 
 Note: The general rule captured by these conditions
@@ -351,7 +351,7 @@ in anchor positioning.
 		for |query el|
 		given the |query el|'s [=default anchor specifier=].
 
-	2. If |anchor spec| is ''auto'':
+	2. If |anchor spec| is ''position-anchor/auto'':
 		1. If the Popover API defines an [=implicit anchor element=] for |query el|
 			which is an [=acceptable anchor element=] for |query el|,
 			return that element.
@@ -481,7 +481,7 @@ is the element's <dfn>default anchor element</dfn>.
 
 Its values are identical to the <<anchor-element>> term
 in ''anchor()'' and ''anchor-size()'',
-except that the ''position-anchor/auto'' value
+except that the <dfn value for=position-anchor>auto</dfn> value
 is equivalent to omitting the <<anchor-element>> in ''anchor()''
 (referring to the [=implicit anchor element=], if one exists).