change planet link

data/main/links/hellug.json

@@ -7,5 +7,6 @@
     {"name": "Photos", "url": "https://photos.hellug.gr"},
     {"name": "Λίστες", "url": "https://lists.hellug.gr"},
     {"name": "Αγγελίες", "url": "https://ads.hellug.gr"},
-    {"name": "linux.gr", "url": "https://www.linux.gr"}
+    {"name": "linux.gr", "url": "https://www.linux.gr"},
+    {"name": "Πλανήτης Hellug", "url": "https://planet.hellug.gr"}
 ]