Fix comment syntax in JetBrains gitignore

[huyz]

Comments must have # starting the line. Inline #s would just prevent the ignore lines from working as intended.

Reasons for making this change

Fix a syntax error which makes .idea/sonarlint.xml ineffective

Links to documentation supporting these rule changes

TODO

https://git-scm.com/docs/gitignore

A line starting with # serves as a comment.

Merge and Approval Steps

• [x] Confirm that you've read the contribution guidelines and ensured your PR aligns
• [ ] Ensure CI is passing
• [ ] Get a review and Approval from one of the maintainers