ITS charter: Corrected extension date.

its-ig/charter.html

@@ -57,7 +57,7 @@ <h1 id="title">Internationalization Tag Set Interest Group Charter</h1>
 			<table class="summary-table">
 				<tr id="Duration">
 					<th rowspan="1" colspan="1">End date</th>
-					<td rowspan="1" colspan="1">31 August 2018</td>
+					<td rowspan="1" colspan="1">30 September 2018</td>
 				</tr>
 				<tr>
 					<th rowspan="1" colspan="1">Confidentiality</th>
@@ -157,7 +157,7 @@ <h2 id="about">About this Charter</h2>
     Document</a>.   In the event of a
     conflict between this document or the provisions of any charter
     and the W3C Process, the W3C Process shall take precedence.</p>
-<p>This charter was extended from 31 March 2018 to 31 August 2018.</p>
+<p>This charter was extended from 31 March 2018 to 30 September 2018.</p>
 		  <p>See the <a
 href="https://www.w3.org/International/its/ig/ITSIGCharter.html">previous charter</a> for this group.</p>
 		  <hr/>