[css-anchor-position] Remove the inset-area() wrapper around the posi…

…tion-try-options value. w3c#10320

css-anchor-position-1/Overview.bs

@@ -1350,7 +1350,7 @@ Giving Fallback Options: the 'position-try-options' property {#position-try-opti
 
 <pre class=propdef>
 Name: position-try-options
-Value: none | [ [<<dashed-ident>> || <<try-tactic>>] | inset-area( <<'inset-area'>> ) ]#
+Value: none | [ [<<dashed-ident>> || <<try-tactic>>] | <<'inset-area'>> ]#
 Initial: none
 Inherited: no
 Applies to: [=absolutely-positioned=] elements
@@ -1436,7 +1436,7 @@ Values have the following meanings:
 
 		Otherwise, does nothing.
 
-	: <dfn>inset-area( <<'inset-area'>> )</dfn>
+	: <dfn><<'inset-area'>></dfn>
 	::
 		Automatically creates a [=position option=]
 		composed solely of an 'inset-area' property