chore - New maintenance issue template

[hjgraca]

Issue number:N/A

Summary

Add new issue template for maintenance tasks

Changes

New template file

Please provide a summary of what's being changed

User experience

Please share what the user experience looks like before and after this change

Checklist

Please leave checklist items unchecked if they do not apply to your change.

• Meets tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Disclaimer: We value your time and bandwidth. As such, any pull requests created on non-triaged issues might not be successful.

[github-actions]

No related issues found. Please ensure there is an open issue related to this change to avoid significant delays or closure.

[github-actions]

@awslabs/aws-lambda-powertools-net No related issues found. Please ensure 'pending-release' label is applied before releasing.