update templates of `rebar3 grisp configure` for grisp.io

[GwendalLaurent]

The current version of the templates used by rebar3 grisp configure were not up to date with the latest changes of grisp.io.

• With the first release of grisp_connect the template can now tag v1.0.0 instead of the main branch
• grisp_updater_grisp2 wasn't included in the deps if the user decided to create a grisp.io app. It it now the case

How to test ?

1. Create a dummy rebar3 project
2. Include rebar3_grisp in the plugin section of the rebar.config file of that project
3. Create the _checkouts directory in that dummy project
4. Either clone or create a simlink to this repository 4.1. Checkout this branch
5. You can now run rebar3 grisp configure inside your dummy project and generate GRiSP apps