[css-nav-1] Fix the link error

Author: Jihye Hong

css-nav-1/Overview.bs

@@ -1504,7 +1504,7 @@ Selecting the navigation algorithm: the 'spatial-navigation-function' property</
 Name: spatial-navigation-function
 Value: normal | grid
 Initial: normal
-Applies to: <a>spatial navigation focus container</a>
+Applies to: <a>spatial navigation container</a>
 Inherited: yes
 </pre>
 
@@ -1545,7 +1545,7 @@ NOTE: These values are negotiated with the users' preferences which seems natura
         <figcaption>Moving focus from "A" to one of the candidate elements</figcaption>
     </figure>
 
-    Let the element which contains "A", "B", "C" and "D" is the <a>spatial navigation focus container</a>.
+    Let the element which contains "A", "B", "C" and "D" is the <a>spatial navigation container</a>.
 
     When the user presses the down arrow key,
     if <code highlight=css>normal</code> value is given to <code highlight=css>spatial-navigation-function</code> of the element, the focus will move to "B".