Update README.md, add hint how to fix Windows installation issue

[ufechner7]

Add hint how to fix the problem with the missing VCRUNTIME140.dll file. This file is not included in any newer Windows installation by default.

[giordano]

This file is not included in any newer Windows installation by default.

Reference of this claim?

[ufechner7]

Reference:
https://answers.microsoft.com/en-us/windows/forum/all/vcruntime140dll-and-msvcp140dll-missing-in-windows/caf454d1-49f4-4d2b-b74a-c83fb7c38625

Well, this is not a proof. There are many Windows versions out in the wild, and some might include it...

[giordano]

For one, you're the first person to report this issue, so I highly doubt your claim is true (but I don't use Windows, so what I know). Also, I doubt mentioning VCRUNTIME140.dll in the README is of any help for anyone, since that file doesn't appear anywhere in the error message shown by the operating system.

[ufechner7]

Well, most people who fail to install a non-essential package will not report it... Furthermore, many users will have installed other software that installs VCRUNTIME140.dll, I tested on a fresh installation...

[ViralBShah]

My experience on windows installs has been personally that especially on fresh installs, at some point one often has to install the MSVC Runtime. I thought that was a thing of the past in modern Windows.

I feel it should be ok to merge this.