Update README.md

README.md

@@ -1,4 +1,4 @@
-## Combine the split files into a single file named 'ILtest.db.gzip'
+## Combine the split files into a single file named 'ILtest.db.gz'
 
 
 ```python
@@ -15,5 +15,5 @@ def combine_files(input_prefix, num_parts, output_file):
             os.remove(part_file)
 
 
-combine_files('ILtest_part', 2, 'ILtest.db.gzip')
+combine_files('ILtest_part', 2, 'ILtest.db.gz')
 ```