Update README.md

Co-authored-by: Mathieu Tortuyaux <[email protected]>

Author: t-lo

README.md

@@ -104,7 +104,7 @@ To clone the scripts repo and pick a version:
 
 ### Working with forks
 
-When using GitHub's "fork" feature, please **make sure to fork all branches**, not just `main`. Forking only `main` is the default on GitHub,
+When using GitHub's "fork" feature, please **make sure to fork all branches**, not just `main`. Forking only `main` is the default on GitHub.
 
 The SDK container wrapper script `run_sdk_container` requires release tags in our release branches and fails to start if no release branch is present (see e.g. https://github.com/flatcar/Flatcar/issues/1705).
 If you have forked manually, please make sure to include all tags. You can retrofit upstream tags to a fork by using e.g.: