SAM: Add note about i2pd concurrent accepts

i2p2www/pages/site/docs/api/samv3.html

 {% extends "global/layout.html" %}
 {% block title %}SAM V3{% endblock %}
-{% block lastupdated %}2023-10{% endblock %}
+{% block lastupdated %}2023-11{% endblock %}
 {% block accuratefor %}API 0.9.59{% endblock %}
 {% block content %}
 <p>SAM is a simple client protocol for interacting with I2P.
@@ -920,7 +920,7 @@ As of SAM 3.2,
 multiple concurrent pending STREAM ACCEPTs are allowed on the same session ID (even with the same port).
 Prior to 3.2, concurrent accepts would fail with ALREADY_ACCEPTING.
 Note: Java I2P also supports concurrent ACCEPTs on SAM 3.1, as of release 0.9.24 (2016-01).
-i2pd does not support concurrent ACCEPTs on SAM 3.1.
+i2pd also supports concurrent ACCEPTs on SAM 3.1, as of release 2.50.0 (2023-12).
 </p>
 
 <h4>Accept Response</h4>