Fix a syntax error in the mirror list from the previous commit.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

mirrors.json

@@ -18,7 +18,7 @@
     "fau": {
         "descr": "Friedrich-Alexander Universität Erlangen-Nürnberg",
         "url": "http://ftp.fau.de/trinity/"
-    }
+    },
     "inetdesign": {
         "descr": "Michael (Internet Design Alliance)",
         "url": "http://tde-mirror-01.inet-design.com/trinity/"