docs: update link to site repository of Freifunk MWU

docs/user/site.rst

@@ -469,7 +469,7 @@ This is a non-exhaustive list of site-repos from various communities:
 * `site-ffhl <https://github.com/freifunk-luebeck/site-ffhl>`_ (Lübeck)
 * `site-fflg <https://github.com/kartenkarsten/site-fflg>`_ (Lüneburg)
 * `site-ffmd <https://github.com/FreifunkMD/site-ffmd>`_ (Magdeburg)
-* `site-ffmwu <https://github.com/freifunk-mwu/site-ffmwu>`_ (Mainz, Wiesbaden & Umgebung)
+* `site-ffmwu <https://github.com/freifunk-mwu/sites-ffmwu>`_ (Mainz, Wiesbaden & Umgebung)
 * `site-ffmyk <https://github.com/FreifunkMYK/site-ffmyk>`_ (Mayen-Koblenz)
 * `site-ffmo <https://github.com/ffruhr/site-ffmo>`_ (Moers)
 * `site-ffmg <https://github.com/ffruhr/site-ffmg>`_ (Mönchengladbach)