gnome-themes-standard/extra: Update version from 3.20.2 to 3.28

Rename package to gnome-themes-extra.

> 3.28
> ====
> - fix HC index.theme generation (#17)
> - fix typo (!3)
>
> 3.27.92
> =======
> - distribute README.md and LICENSE (again)
>
> 3.27.90.1
> =========
> - update configure.ac to new name
>
> 3.27.90
> =======
> - rename to gnome-themes-extra
> - update README.md, various metafile updates
> - fix out-of-tree HC builds (Alexandre Rostovtsev)
> - use zopflipng (Ville Skyttä)
> - icon theme metadata updates (Jeremy Bicha, Dariusz Gadomski)
> - translation updates
>
> 3.22.3
> ======
> - dark theme fix
> - minor tweaks
>
> 3.22.2
> ======
> - dark theme updates by Juraj Fiala
> - Adwaita updates by Lapo Calamandrei
>
> 3.22.1
> ======
> - gtk2 dark variant by Juraj Fiala
> - translations

[1]: https://gitlab.gnome.org/GNOME/gnome-themes-extra/blob/master/NEWS

gnome-themes-standard.be0 → gnome-themes-extra.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION gnome-themes-standard-3.20.2-1
+# BEE_VERSION gnome-themes-extra-3.28-0
 
 #http://www.linuxfromscratch.org/blfs/view/systemd/gnome/gnome-themes-standard.html
 #
@@ -11,7 +11,7 @@
 ## The source URL(s) define the location of the sources that will be
 ## downloaded. Version variables may be used to simplify reuse of this bee-file.
 
-SRCURL[0]="https://ftp.gnome.org/pub/gnome/sources/gnome-themes-standard/${PKGVERSION[2]}/gnome-themes-standard-${PKGVERSION}.tar.xz"
+SRCURL[0]="https://ftp.gnome.org/pub/gnome/sources/gnome-themes-extra/${PKGVERSION[2]}/gnome-themes-extra-${PKGVERSION}.tar.xz"
 
 ###############################################################################
 ## Add URLs/pathes to patch files to the PATCHURL array.