Shift exercise in config.json

Author: andreatanky

config.json

@@ -810,6 +810,14 @@
         ],
         "difficulty": 4
       },
+      {
+        "slug": "rate-limiter",
+        "name": "rate-limiter",
+        "uuid": "b4b0c60e-4ce1-488e-948f-bcb6821c773c",
+        "practices": [],
+        "prerequisites": ["generic-types"],
+        "difficulty": 4
+      },
       {
         "slug": "rotational-cipher",
         "name": "Rotational Cipher",
@@ -1901,14 +1909,6 @@
           "lists"
         ],
         "difficulty": 10
-      },
-      {
-        "slug": "rate-limiter",
-        "name": "rate-limiter",
-        "uuid": "b4b0c60e-4ce1-488e-948f-bcb6821c773c",
-        "practices": [],
-        "prerequisites": ["generic-types"],
-        "difficulty": 4
       }
     ],
     "foregone": [