doc: add 15.x - 18.x to Other Versions section

Added 15.x - 18.x changelog links to the Other Versions section.

PR-URL: #43940
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Feng Yu <F3n67u@outlook.com>

doc/changelogs/CHANGELOG_ARCHIVE.md

@@ -154,6 +154,10 @@
 </table>
 
 * Other Versions
+  * [18.x](CHANGELOG_V18.md)
+  * [17.x](CHANGELOG_V17.md)
+  * [16.x](CHANGELOG_V16.md)
+  * [15.x](CHANGELOG_V15.md)
   * [14.x](CHANGELOG_V14.md)
   * [13.x](CHANGELOG_V13.md)
   * [12.x](CHANGELOG_V12.md)