[css-overflow] Fix bikeshed markup error

Author: frivoal

css-overflow/Overview.bs

@@ -543,7 +543,7 @@ The computed value of the 'continue' for a given element or pseudo element is de
 		the computed value is ''continue/paginate''
 		<li>On a <a>fragment box</a>
 		the computed value is ''continue/fragments''
-		<li>Otherwise, the computed value is 'continue/overflow''
+		<li>Otherwise, the computed value is ''continue/overflow''
 	</ol>
 	<li>If the specified value is ''continue/framgents''
 	<ol>

css-overflow/Overview.html

@@ -1521,7 +1521,7 @@ <h2 class="heading settled" data-level="4" id="fragmentation"><span class="secno
       <li>On a <a data-link-type="dfn" href="#fragment-box">fragment box</a>
 		the computed value is <a class="css" data-link-type="maybe" href="#valdef-continue-fragments">fragments</a>
 
-      <li>Otherwise, the computed value is <a class="property" data-link-type="propdesc">overflow</a>'
+      <li>Otherwise, the computed value is <a class="css" data-link-type="maybe" href="#valdef-continue-overflow">overflow</a>
 
      </ol>