HBASE-20371 note hbasecon cfp on landing page.

src/site/xdoc/index.xml

@@ -83,7 +83,7 @@ Apache HBase is an open-source, distributed, versioned, non-relational database
 </section>
 
      <section name="News">
-       <p>June 18th, 2018 <a href="https://hbase.apache.org/hbasecon-2018">HBaseCon 2018</a> @ San Jose Convention Center, San Jose, CA, USA</p>
+       <p>June 18th, 2018 <a href="https://hbase.apache.org/hbasecon-2018">HBaseCon 2018</a> @ San Jose Convention Center, San Jose, CA, USA. CFP open, see site for details!</p>
        <p>August 4th, 2017 <a href="https://easychair.org/cfp/HBaseConAsia2017">HBaseCon Asia 2017</a> @ the Huawei Campus in Shenzhen, China</p>
        <p>June 12th, 2017 <a href="https://easychair.org/cfp/hbasecon2017">HBaseCon2017</a> at the Crittenden Buildings on the Google Mountain View Campus</p>
        <p>April 25th, 2017 <a href="https://www.meetup.com/hbaseusergroup/events/239291716/">Meetup</a> @ Visa in Palo Alto</p>