Fix command in README

[reekystive]

• Pip package request does not exist. Maybe requests?

• pip3 install pillow pytesseract may cause error, because pytesseract requires pillow:

ERROR: Command errored out with exit status 1:
...
File "/tmp/pip-install-2k6127uv/pytesseract/pytesseract/pytesseract.py", line 28, in <module>
        import Image
    ModuleNotFoundError: No module named 'Image'
...

Installing pillow and pytesseract separately works.

This issue exist in Python 3.8.10 + pip 20.0.2, and doesn't exist in Python 3.10.1 + pip 21.2.4.

Using a CLEAN docker container.