Infinite loop if pre-commit fixes changelog fragment file

[klmcadams]

🔍 Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

🐞 Description of the bug

There was a trailing whitespace in a changelog fragment file, so pre-commit fixed it, which caused the doc-changelog action to think that its fragment file was modified so it replaced it with the title containing the trailing whitespace. This continued a bunch of times

📝 Steps to reproduce

Create a PR with a trailing whitespace in a repo that has doc-changelog and pre-commit.ci set up

Links:
https://github.com/ansys/pymechanical/actions/runs/8474078508/job/23219758431
ansys/pymechanical#666

💻 Which operating system are you using?

Linux

📀 Which ANSYS version are you using?

N/A

🐍 Which Python version are you using?

3.9

📦 Installed packages

N/A

[MaxJPRey]

Nice catch @klmcadams .