Implement support for new dynamic values {{$

{issue.id}}} and ${issue.key} to align with Jira conventions.

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h4. Accepted criteria

* Add support for the {{${issue.id}

}} dynamic value to represent the issue ID.

• Add support for the {{$ {issue.key}

  }} dynamic value to represent the issue key.

• Verify the new placeholders function dynamically in APJ.
• Update documentation.