doc: update the "current as of" date in the PG 10 release notes

bmomjian · bmomjian · commit de7cca982ca2 · 2017-05-14T23:15:50.000-04:00
diff --git a/doc/src/sgml/release-10.sgml b/doc/src/sgml/release-10.sgml
@@ -6,7 +6,7 @@
 
   <formalpara>
    <title>Release date:</title>
-   <para>2017-09-XX (CURRENT AS OF 2017-04-22)</para>
+   <para>2017-09-XX (CURRENT AS OF 2017-05-14)</para>
   </formalpara>
 
   <sect2>
