Pontoon: Update Igbo (ig) localization of Firefox Send

Co-authored-by: sugabelly <sugabelly@gmail.com>

public/locales/ig/send.ftl

@@ -4,3 +4,13 @@ fileTooBig = File a ebuka to upload. Ọ kwẹsịrọ ịkalị { $size }
 
 ## Send version 2 strings
 
+timespanDays =
+    { $num ->
+        [one] 1 ụbọchị
+       *[other] ụbọchị { $num }
+    }
+timespanWeeks =
+    { $num ->
+        [one] 1 izu
+       *[other] izu { $num }
+    }