Add alternatives to readme

[yossy201410]

As the title says, development of the Atom project will end in 2022.
You can continue to use Atom, but instead of GitHub, which has abandoned development, the community has created something called the "Pulsar editor," and the author of Atom has created something called the "Zed Editor."

[icecream17]

please clarify what the issue is

for example:
this is not working / change this to that

edit: I will presume this is about adding this information to the readme

edit 2: "will end in 2022" seems copy pasted?