Fix format of sqs.adoc

[mmaeller]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

Fix format of https://docs.awspring.io/spring-cloud-aws/docs/4.0.0/reference/html/index.html#global-configuration-for-sqslisteners

💡 Motivation and Context

Documentation can be used properly again.

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• I updated reference documentation to reflect the change
• All tests passing
• No breaking changes

🔮 Next steps

[tomazfernandes]

Thanks for the fix @mmaeller!

I reproduced the formatting regression locally and confirmed this restores the docs output past the affected section.

Follow-up: I opened #1571 and PR #1572 to add a docs validation job in CI and make the docs build fail on AsciiDoc warnings. I verified it would have flagged this regression, so similar issues should be caught before merge going forward.