Readme typo and get_article crash fix

[TheNetworkGuy]

Since the project is now version 2, the package should also be imported from version 2 :)

[TheNetworkGuy]

I've updated the code since i got a crash using get_article():

    producer = re.sub(color_regex, "", str(article_details[1]["markdown"]))
                                           ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
KeyError: 'markdown'

After looking at the code i noticed that the code assumes a key for all products while that might not always be the case. For example with Banana's with ID s1016186 in country_code "NL". I've made a change so that it has a fallback so an empty string should there be no clear manufacturer defined.

[codesalatdev]

Interesting that there are products without a producer...

Anyway, fully valid. Thanks for the PR!

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 68.28%. Comparing base (3816f4c) to head (e63ede2).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/python_picnic_api2/client.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #12   +/-   ##
=======================================
  Coverage   68.28%   68.28%           
=======================================
  Files           4        4           
  Lines         227      227           
=======================================
  Hits          155      155           
  Misses         72       72           

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[TheNetworkGuy]

Thanks @codesalatdev ! Looking forward to a new package version so that other users won;t have to deal with this issue anymore :)