[css-writing-modes-3] implementation-report.html: minor editorial

Author: kojiishi

css-writing-modes-3/implementation-report.html

@@ -116,9 +116,10 @@ <h3>Tests that are not MUST</h3>
     they are not considered as required.
   <table id="may" class="results"></table>
 
-  <h3>Tests that were moved to Level 4</h3>
+  <h3>Tests that were at risk and should move to Level 4</h3>
   <p>Following tests do not have 2 implementations,
-    but they were <i>at risk</i> in the CR and were moved to Level 4.
+    but they were <i>at risk</i> in the CR and
+    should move to Level 4 test suites.
   <table id="at-risk" class="results"></table>
 
   <h2>All results</h2>