fix(docs): command to install chrome

[laqieer]

[aslushnikov]

"msedge" or "chrome" is just an example value; either would work in the docs, so I don't think changing one to another is beneficial.

[laqieer]

The point is not to change one to another, but to remove duplication. It is confused to see duplicated lines playwright install msedge. No idea why duplicates exist. After reading the source code, I guess they are for different shells, but they still look strange without any indication. It is better to add tab to indicate shell if they are for usage in different shells.

[mxschmitt]

I followed-up in #21027 to fix it. Thanks!