Link to "Data Wrangling with DataFrames.jl Cheat Sheet" is broken in the documentation

In the documentation (Introduction), the link to **Data Wrangling with DataFrames.jl Cheat Sheet** is broken. It points to:

"https://www.ahsmart.com/pub/data-wrangling-with-data-frames-jl-cheat-sheet/" → **results in 404 error**

I would propose to use the following link from Tom's site:

https://ahsmart.com/posts/data-wrangling-with-data-frames-jl-cheat-eheet/DataFramesCheatSheet_v1.x_rev1.pdf