Update release notes for session bindings change

Author: peterdettman

docs/releasenotes.html

@@ -25,6 +25,7 @@ <h3>2.1.2 Defects Fixed</h3>
 <ul>
 <li>SNOVA and MAYO are now correctly added to the JCA provider module-info file.</li>
 <li>TLS: Avoid nonce reuse error in JCE AEAD workaround for pre-Java7.</li>
+<li>BCJSSE: Session binding map is now shared across all stages of the session lifecycle (SunJSSE compatibility).</li>
 </ul>
 <h3>2.1.3 Additional Features and Functionality</h3>
 <ul>