wget: Update to version 1.21.4

wget: Update to version 1.21.4

- Update from version 1.21.3 to 1.21.4
- Update of rootfile not required
- Changelog
Noteworthy changes in release 1.21.4 (2023-05-11)
	 Document --retry-on-host-error in help text
	 Increase read buffer size to 64k. This should speed up downloads on gigabit and
	  faster connections
	 Update deprecated option '--html-extension' to '--adjust-extension' in
	  documentation
	 Update gnulib compatibility layer.
	   Fixes HSTS test failures on i686. (Thanks to Andreas Enge for ponting it out)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>