Describe the bug

A clear and concise description of what the bug is. Include version by typing gh --version.
There is a missing \n after the error message when an extension fails to run, i.e.

failed to run extension: fork/exec /workspace/.local/share/gh/extensions/gh-gei/gh-gei: no such file or directorybuild@audreee-r6dx8enti:~/.local/share/gh/extensions/gh-gei$ cd /.local/share/gh/extensions/gh-gei

Steps to reproduce the behavior

1. Try to run a CLI extension (that is buggy and can't run properly)
2. Encounter the "failed to run extension" error

Expected vs actual behavior

A clear and concise description of what you expected to happen and what actually happened.

Expected:
After the error message, there should be a new line

Actual: There is no new line

Logs

Paste the activity from your command line. Redact if needed.