Change ckb autonym to just "کوردی"

This was requested by the Wikipedia community,
and it is the practice on other websites, too.

More details at
https://phabricator.wikimedia.org/T116761

data/generated-langdb.json

@@ -608,7 +608,7 @@
             [
                 "ME"
             ],
-            "کوردیی ناوەندی"
+            "کوردی"
         ],
         "cnh": [
             "Latn",

data/langdb.yaml

@@ -102,7 +102,7 @@ languages:
   cjy: [cjy-hant]
   cjy-hans: [Hans, [AS], 晋语（简化字)]
   cjy-hant: [Hant, [AS], 晉語]
-  ckb: [Arab, [ME], کوردیی ناوەندی]
+  ckb: [Arab, [ME], کوردی]
   cnh: [Latn, [AS], Lai holh]
   co: [Latn, [EU], corsu]
   cps: [Latn, [AS], Capiceño]