Add Matsu MG/GOG Linux specific UI file manual download link

- See 07th-mod/matsuribayashi#32 (comment)

docs/Higurashi/Manual-Installation.md

@@ -214,7 +214,7 @@
 <td style="text-align: center;"><a href="https://07th-mod.com/ui.php?chapter=meakashi&os=unix&unity=5.5.3p3">Steam</a><br><a href="https://07th-mod.com/ui.php?chapter=meakashi&os=unix&unity=5.5.3p3">MangaGamer</a><br><a href="https://07th-mod.com/ui.php?chapter=meakashi&os=unix&unity=5.5.3p3">GOG</a><br><a href="https://07th-mod.com/ui.php?chapter=meakashi&os=unix&unity=5.5.3p1">GOG (old)†</a></td>
 <td style="text-align: center;"><a href="https://07th-mod.com/ui.php?chapter=tsumihoroboshi&os=unix&unity=5.5.3p3">Steam</a><br><a href="https://07th-mod.com/ui.php?chapter=tsumihoroboshi&os=unix&unity=5.5.3p3">MangaGamer</a><br><a href="https://07th-mod.com/ui.php?chapter=tsumihoroboshi&os=unix&unity=5.5.3p3">GOG</a></td>
 <td style="text-align: center;"><a href="https://07th-mod.com/ui.php?chapter=minagoroshi&os=unix&unity=5.6.7f1">Steam</a><br><a href="https://07th-mod.com/ui.php?chapter=minagoroshi&os=unix&unity=5.6.7f1">MangaGamer</a><br><a href="https://07th-mod.com/ui.php?chapter=minagoroshi&os=unix&unity=5.6.7f1">GOG</a></td>
-<td style="text-align: center;"><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">Steam</a><br><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">MangaGamer</a><br><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">GOG</a><br></td>
+<td style="text-align: center;"><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">Steam</a><br><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">MangaGamer/GOG(MacOS)</a><br><a href="https://07th-mod.com/rikachama/ui/Matsuribayashi-UI_2017.2.5_unix_gog_mg.7z">Mangagamer/GOG(Linux)</a><br><br><a href="https://07th-mod.com/ui.php?chapter=matsuribayashi&os=unix&unity=2017.2.5">MangaGamer/GOG<br>(Linux Old)</a><br></td>
 </tr>
 <tr class="odd">
 <td style="text-align: center;">Compatibility packs</td>