Some READMEs refer to an old version of the quickstart guide

[D4ryl00]

Description

The two READMEs:

• https://github.com/gnolang/gno/blob/master/README.md
• https://github.com/gnolang/gno/blob/master/gno.land/cmd/gnokey/README.md

refer to the quickstart guide on the blockchain: https://test2.gno.land/r/boards:testboard/5
which is outdated from the latest version: https://github.com/gnolang/gno/blob/master/examples/gno.land/r/demo/boards/README.md

I suggest the quickstart guide point to the GitHub version instead of the blockchain version to avoid new users wasting their time to understand why that doesn't work as expected.

Are there things I don't know that you prefer to keep to the blockchain version?

[D4ryl00]

Or you can automatically update the board with a CI's job when the README changes. In the meantime, let's use this Github's README instead.

[moul]

The project is changing, and quickstart guides can become outdated.

Let's establish the official guide on GitHub and update onchain guide to link to GitHub.

Later, we can consider reverting to an onchain-first approach.

cc @gnolang/devrels

[D4ryl00]

Ok, we can open a PR on that repo to change that.