Update README.md to indicate significant issue

README.md

@@ -3,6 +3,10 @@
 ##### Get the best courses :books: powered by openedx offline :arrow_down:
 An offliner to create ZIM :package: files from openedx powered courses
 
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+| :zap: Scraper is known to have a very significant issue on recent openEdx version, we are looking for resources / support to work on this issue (https://github.com/openzim/openedx/issues/175) |
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 [![PyPI](https://img.shields.io/pypi/v/openedx2zim?style=for-the-badge)](https://pypi.org/project/openedx2zim/)
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