Fix エ decapping to ェ

Both characters map back to character 0x83, but 0x83 previously mapped
back to the lowercase variant which was unlike the others.
(オ and ォ -> オ)

Thanks Afepoke & smileynation!

PKHeX.Core/PKM/StringConverter.cs

@@ -729,7 +729,7 @@ private static byte SetG3Char(ushort chr, bool jp)
             {0x80, "ア"},
             {0x81, "イ"},
             {0x82, "ウ"},
-            {0x83, "ェ"},
+            {0x83, "エ"},
             {0x84, "オ"},
             {0x85, "カ"},
             {0x86, "キ"},