minor update to metadata.json

Author: MeelahMe

influxdb3-explorer/metadata.json

@@ -1,10 +1,9 @@
 {
-    "hub": {
-      "categories": [
-        "data-science",
-        "databases-and-storage",
-        "internet-of-things"
-      ]
-    }
+  "hub": {
+    "categories": [
+      "data-science",
+      "databases-and-storage",
+      "internet-of-things"
+    ]
   }
-  
+}