Fix discussion notes spec timeout

What does this MR do?

We weren't able to reproduce the test failure locally, but let's increase the timeout and monitor from there.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Links

• Closes #61596 (closed)