wget: Update to version 1.21.2

wget: Update to version 1.21.2

- Update from 1.21.1 to 1.21.2
- Update of rootfile not required
- Changelog
   Noteworthy changes in release 1.21.2 (2021-09-07) - (user visible changes)
     * Support for autoconf 2.71
     * Fix a double free in FTP when using an absolute path
     * Release tarballs no longer have a dependency on Python.
     * --page-requisites will now also download links marked as "alternate
       stylesheet" or "icon"
   Full changelog is too long to include here but can be viewed in the ChangeLog file in
    the source tarball

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>