add ILUGC Chennai

As per request on mailing list by Mohan R
See https://forum.disroot.org/t/adding-ilugc-to-fsug-in/9568

js/locations.js

@@ -283,4 +283,12 @@ var locations = [{
    "MLIST": "",
    "MATURL": "",
    "TGURL": ""
+}, {
+  "LAT":"12.991829015583626",
+  "LNG": "80.22862809291958",
+  "TITLE": "ILUGC (Indian Linux User Group - Chennai)",
+  "URL": "https://ilugc.in",
+  "MLIST": "https://www.freelists.org/list/ilugc",
+  "MATURL": "https://matrix.to/#/#ilugc:libera.chat",
+  "TGURL": ""
 }];
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