Add Siriono (srq) and update Cape Verdean (kea) capitalization

See downstream task:
https://phabricator.wikimedia.org/T284870

Siriono (srq) autonym verified in
Gasparini, Noé; Dicarere Mendez, Victor Hugo (2015).
Diccionario sirionó: sirionó - castellano - inglés y castellano - sirionó

data/language-data.json

@@ -1879,7 +1879,7 @@
             [
                 "AF"
             ],
-            "Kabuverdianu"
+            "kabuverdianu"
         ],
         "kg": [
             "Latn",
@@ -3570,6 +3570,13 @@
         "skr": [
             "skr-arab"
         ],
+        "srq": [
+            "Latn",
+            [
+                "AM"
+            ],
+            "mbia cheë"
+        ],
         "syc": [
             "Syrc",
             [