Update release note template

Author: ZheSun88

all/src/main/templates/release-notes.html

@@ -60,12 +60,12 @@ <h2 id="overview">Overview of Vaadin Framework @version@ Release</h2>
         <p>
             Vaadin Framework @version@ is a
 <!--            maintenance release that includes a number of bug fixes, as listed in the <a href="#changelog">change log</a> below. -->
-<!--            feature release that includes -->
-                pre-release for evaluating
+                feature release that includes 
+<!--            pre-release for evaluating -->
                 a number of new features and bug fixes, as listed in the <a
                 href="#enhancements">list of enhancements</a> and <a
                 href="#changelog">change log</a> below.
-		The API in this alpha version is not considered final and may change based on your feedback.
+<!-- 		The API in this alpha version is not considered final and may change based on your feedback. -->
 	</p>
 
         <!-- ================================================================ -->