Update the "iteration task" issue template to "sprint task"

[jacobsimionato]

This should make it easier to create tasks in the sprint.

• Add "sprint ready" tag, to automate adding to the project.
• Add default P2 priority to skip triage

[gemini-code-assist]

Code Review

This pull request updates the issue template for sprint tasks, renaming the file and modifying the template's content. My review includes one suggestion to improve the clarity of the template's description to better align with the project's contribution guidelines for clear documentation.

[gemini-code-assist]

The about description is somewhat vague. Per the repository's contributing guidelines (docs/contributing/README.md), documentation should be clear and concise. The current description, "An issue used sprint planning", doesn't clearly describe the purpose of the issue itself, which can be confusing for users selecting a template. A more descriptive text would be more helpful.

Suggested change

	about: An issue used sprint planning
	about: A concrete implementation task to be completed during the current sprint.

References

1. The repository's contributing guidelines state that all documentation (including .md files like issue templates) should be clear, consistent, and concise. The current 'about' text could be clearer. ^(link)

[polina-c]

Do we want to add label 'front-line-treaged' instead of P2?

Normally current sprint is P1, so i would just skip priority