Added myself to contributors.json

Author: Kale2605

_data/contributors.json

@@ -3247,6 +3247,11 @@
       "firstname": "Dora",
       "lastname": "Stricker",
       "github": "dorastr"
+    },
+    {
+      "firstname": "Thomas",
+      "lastname": "Karlbauer",
+      "github": "Kale2605"
     }
   ]
 }