README: Remove the explicit version checkout

Since we can't expand macros in the README, and it is too much work to
keep the version updated, we just remove it from there and ask the user
to manually check what's the latest version.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

README.md

@@ -48,14 +48,17 @@ directory will be created with the generated project name. For example:
 
 ```sh
 cd ~/devel
-cookiecutter gh:frequenz-floss/frequenz-repo-config-python \
-    --directory=cookiecutter \
-    --checkout v0.6.2
+cookiecutter gh:frequenz-floss/frequenz-repo-config-python --directory=cookiecutter
 ```
 
 This command will prompt you for the project type, name, and other
 configuration options, and it will generate the entire project for you.
 
+It is recommended to use a released version, you can do that by adding the
+option `--checkout <version>` to the command above. You can check which is the
+latest version
+[here](https://github.com/frequenz-floss/frequenz-repo-config-python/releases/latest).
+
 After completing the project and fixing the `TODO`s, you can either amend the
 previous commit using `git commit --amend` or create a new commit for the
 changes using `git commit`.