Bug - classification format type not done correctly

[enoch3712]

Exception has occurred: ValueError
Unsupported file type: /Users/regina/Desktop/ExtractThinker/tests/test_images/invoice.png
File "/Users/regina/Desktop/ExtractThinker/extract_thinker/extractor.py", line 241, in classify
raise ValueError(f"Unsupported file type: {input}")
File "/Users/regina/Desktop/ExtractThinker/tests/test_classify.py", line 60, in test_classify_feature
result = extractor.classify(INVOICE_FILE_PATH, COMMON_CLASSIFICATIONS)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/regina/Desktop/ExtractThinker/tests/test_classify.py", line 235, in
test_classify_feature()
ValueError: Unsupported file type: /Users/regina/Desktop/ExtractThinker/tests/test_images/invoice.png