Update README.md

README.md

@@ -7,5 +7,5 @@ A curation of datasets for educations purposes.
 ### California Housing
 
 Since SciKit Learn's [California Housing dataset](https://scikit-learn.org/stable/datasets/real_world.html#california-housing-dataset) often fails to download this is the Data Frame of the data in CSV format.  
-By default [SciKit Learn use some pre processing](https://github.com/scikit-learn/scikit-learn/blob/d3898d9d57aeb1e960d266613a2e31b07bca39d7/sklearn/datasets/_california_housing.py#L208-L220) of the original data.  
+By default [SciKit Learn use some pre processing](https://github.com/scikit-learn/scikit-learn/blob/d3898d9d57aeb1e960d266613a2e31b07bca39d7/sklearn/datasets/_california_housing.py#L208-L220) of the [original data](https://web.archive.org/web/20250912205745/https://www.dcc.fc.up.pt/~ltorgo/Regression/cal_housing.html).  
 This CSV is the data after the processing of SciKit Learn.