doc: fix some table problems in changelog.md

PR-URL: https://github.com/nodejs/node/pull/9183
Reviewed-By: Claudio Rodriguez <cjrodr@yahoo.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

 Conflicts:
	CHANGELOG.md

CHANGELOG.md

@@ -66,9 +66,9 @@ release.
   </td>
   <td valign="top">
 <b><a href="doc/changelogs/CHANGELOG_V4.md#4.5.0">4.5.0</a></b><br/>
-<a href="doc/changelogs/CHANGELOG_V4.md#4.4.7">4.4.7</a></b>
-<a href="doc/changelogs/CHANGELOG_V4.md#4.4.6">4.4.6</a></b>
-<a href="doc/changelogs/CHANGELOG_V4.md#4.4.5">4.4.5</a></b>
+<a href="doc/changelogs/CHANGELOG_V4.md#4.4.7">4.4.7</a><br/>
+<a href="doc/changelogs/CHANGELOG_V4.md#4.4.6">4.4.6</a><br/>
+<a href="doc/changelogs/CHANGELOG_V4.md#4.4.5">4.4.5</a><br/>
 <a href="doc/changelogs/CHANGELOG_V4.md#4.4.4">4.4.4</a><br/>
 <a href="doc/changelogs/CHANGELOG_V4.md#4.4.3">4.4.3</a><br/>
 <a href="doc/changelogs/CHANGELOG_V4.md#4.4.2">4.4.2</a><br/>