Update README.md

Author: wolfiex

README.md

@@ -19,8 +19,13 @@ For the CMIP-Data-Request development repository try [cmip-data-request.github.i
 
 ### Viewing an IPyNb online. 
 #### Steps to Convert:
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 Copy the GitHub notebook URL (e.g., https://github.com/user/repo/blob/main/path/to/notebook.ipynb).
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 Replace https://github.com with https://nbviewer.jupyter.org/github.
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 Ensure blob/ remains in the path for the nbviewer link to work correctly.