Update README.md

[zotabee]

Dear team,

Please update the readme with .Net 8.x, in "Build", step 1 :

To build this plugin you will need .Net 6.x.

->

To build this plugin you will need .Net 8.x.

Thanks

[foux]

Why don't you just create a pull request?

[zotabee]

I'm not comfortable at all with Git/Github to create a pull without possibly messing up with everything... not sure how it works. 🤔