Updated links for An Introduction to Statistical Learning (#10887)

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Co-authored-by: John Doe <johndoe@email.com>

books/free-programming-books-langs.md

@@ -1947,7 +1947,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [A Guide to Python's Magic Methods](https://github.com/RafeKettler/magicmethods) - Rafe Kettler
 * [A Practical Introduction to Python Programming](https://www.brianheinold.net/python/) - Brian Heinold (HTML, PDF, Exercises sources)
 * [A Whirlwind Tour of Python](https://jakevdp.github.io/WhirlwindTourOfPython/) - Jake VanderPlas
-* [An Introduction to Statistical Learning with Applications in Python](https://hastie.su.domains/ISLP/ISLP_website.pdf) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani, Jonathan Taylor (PDF)
+* [An Introduction to Statistical Learning with Applications in Python](https://hastie.su.domains/ISLP/ISLP_website.pdf.view-in-google.html) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani, Jonathan Taylor (PDF)
 * [Architecture Patterns with Python](https://www.cosmicpython.com/book/preface.html) - Harry J.W. Percival, Bob Gregory (HTML)
 * [Automate the Boring Stuff with Python, 2nd Edition: Practical Programming for Total Beginners](https://automatetheboringstuff.com/2e/chapter0/) - Al Sweigart (3.8)
     * [Automate the Boring Stuff with Python: Practical Programming for Total Beginners](https://automatetheboringstuff.com/chapter0/) - Al Sweigart (3.4)
@@ -2155,7 +2155,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Advanced R Programming](http://adv-r.had.co.nz) - Hadley Wickham
 * [An Introduction to ggplot2](https://bookdown.org/ozancanozdemir/introduction-to-ggplot2) - Ozancan Ozdemir
 * [An Introduction to R](https://cran.r-project.org/doc/manuals/R-intro.html) - David M. Smith, William N. Venables
-* [An Introduction to Statistical Learning with Applications in R](https://web.stanford.edu/~hastie/ISLR2/ISLRv2_website.pdf) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani (PDF)
+* [An Introduction to Statistical Learning with Applications in R](https://hastie.su.domains/ISLR2/ISLRv2_corrected_June_2023.pdf.view-in-google.html) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani (PDF)
 * [Beyond Multiple Linear Regression](https://bookdown.org/roback/bookdown-BeyondMLR) - Paul Roback, Julie Legler
 * [blogdown: Creating Websites with R Markdown](https://bookdown.org/yihui/blogdown/) - Yihui Xie, Amber Thomas, Alison Presmanes Hill
 * [Cookbook for R](http://www.cookbook-r.com) - Winston Chang

more/problem-sets-competitive-programming.md

@@ -80,6 +80,7 @@
 * [CrowdANALYTIX](https://www.crowdanalytix.com/community)
 * [DrivenData](https://www.drivendata.org)
 * [Kaggle](https://www.kaggle.com)
+* [Zindi](https://zindi.africa)
 
 
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