Add the Nyankore language (nyn)

Requested at
https://en.wikipedia.org/w/index.php?title=User_talk:Amire80&oldid=1065825851#Translate_wiki_registration

Autonym according to Ethnologue.

data/langdb.yaml

@@ -454,6 +454,7 @@ languages:
   nus: [Latn, [AF], Thok Naath]
   nv: [Latn, [AM], Diné bizaad]
   ny: [Latn, [AF], Chi-Chewa]
+  nyn: [Latn, [AF], runyankore]
   nys: [Latn, [PA], Nyungar]
   oc: [Latn, [EU], occitan]
   ojb: [Latn, [AM], Ojibwemowin]

data/language-data.json

@@ -2925,6 +2925,13 @@
             ],
             "Chi-Chewa"
         ],
+        "nyn": [
+            "Latn",
+            [
+                "AF"
+            ],
+            "runyankore"
+        ],
         "nys": [
             "Latn",
             [
@@ -6105,6 +6112,7 @@
         "UG": [
             "sw",
             "lg",
+            "nyn",
             "en",
             "rw",
             "hi"