doc: update Node.js 16 End-of-Life date

Node.js 16's End-of-Life date was brought forward to coincide with
the end of support for upstream OpenSSL 1.1.1.

PR-URL: #45103
Refs: https://nodejs.org/en/blog/announcements/nodejs16-eol/
Refs: nodejs/Release#752
Refs: nodejs/TSC#1222
Reviewed-By: Beth Griggs <bethanyngriggs@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

CHANGELOG.md

@@ -31,7 +31,7 @@ release.
   <th title="Current"><a href="doc/changelogs/CHANGELOG_V19.md">19</a> (Current)</th>
   <th title="Current"><a href="doc/changelogs/CHANGELOG_V18.md">18</a> (Current)</th>
   <th title="Current"><a href="doc/changelogs/CHANGELOG_V17.md">17</a> (Current)</th>
-  <th title="LTS Until 2024-04"><a href="doc/changelogs/CHANGELOG_V16.md">16</a> (LTS)</th>
+  <th title="LTS Until 2023-09"><a href="doc/changelogs/CHANGELOG_V16.md">16</a> (LTS)</th>
   <th title="LTS Until 2023-04"><a href="doc/changelogs/CHANGELOG_V14.md">14</a> (LTS)</th>
   <th title="LTS Until 2022-04"><a href="doc/changelogs/CHANGELOG_V12.md">12</a> (LTS)</th>
 </tr>