doc: simplify CHANGELOG.md

Remove unnecessary `<sup>` usage and lint-disabling comment.

Author: Trott

CHANGELOG.md

@@ -23,13 +23,11 @@ Select a Node.js version below to view the changelog history:
 Please use the following table to find the changelog for a specific Node.js
 release.
 
-<!--lint disable maximum-line-length-->
-
 <table>
 <tr>
-  <th title="Current"><a href="doc/changelogs/CHANGELOG_V16.md">16</a><sup>Current</sup></th>
-  <th title="LTS Until 2023-04"><a href="doc/changelogs/CHANGELOG_V14.md">14</a><sup>LTS</sup></th>
-  <th title="LTS Until 2022-04"><a href="doc/changelogs/CHANGELOG_V12.md">12</a><sup>LTS</sup></th>
+  <th title="Current"><a href="doc/changelogs/CHANGELOG_V16.md">16</a> (Current)</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>
 <tr>
     <td valign="top">