Fix typo for group creation error message.
Fix typo for group creation error message.

kavskalyan/TileDB,npapa/TileDB,TileDB-Inc/TileDB,npapa/TileDB,kavskalyan/TileDB,Intel-HLS/TileDB,Intel-HLS/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB