Fix link for Data Wrangling with DataFrames.jl Cheat Sheet (#3519)

Author: gwr-de

docs/src/index.md

@@ -9,7 +9,7 @@ For more illustrations of DataFrames.jl usage, in particular in conjunction with
 other packages you can check-out the following resources
 (they are kept up to date with the released version of DataFrames.jl):
 * [DataFrames.jl: Flexible and Fast Tabular Data in Julia](https://www.jstatsoft.org/article/view/v107i04) article published in the *Journal of Statistical Software*
-* [Data Wrangling with DataFrames.jl Cheat Sheet](https://www.ahsmart.com/pub/data-wrangling-with-data-frames-jl-cheat-sheet/)
+* [Data Wrangling with DataFrames.jl Cheat Sheet](https://ahsmart.com/posts/data-wrangling-with-data-frames-jl-cheat-eheet/DataFramesCheatSheet_v1.x_rev1.pdf)
 * [DataFrames Tutorial using Jupyter Notebooks](https://github.com/bkamins/Julia-DataFrames-Tutorial/)
 * [Julia Academy DataFrames.jl tutorial](https://github.com/JuliaAcademy/DataFrames)
 * [JuliaCon 2023](https://github.com/bkamins/JuliaCon2023-Tutorial),