This pull request updates the documentation review workflow in .github/workflows/doc-check.yaml to improve clarity and introduce sticky comment logic for doc-check reviews. The changes focus on refining the review context messages and providing detailed instructions for updating existing doc-check comments, ensuring more consistent and actionable documentation feedback.

Workflow message and prompt improvements:

• Refined the context messages for different PR trigger types to be clearer and less repetitive, making instructions more concise for the agent.

Sticky comment logic and instructions:

• Updated the task prompt to instruct the agent to look for an existing doc-check comment containing <!-- doc-check-sticky --> and update it instead of creating a new one, supporting more efficient and organized review threads.
• Added detailed instructions for how to update sticky comments, including checking off addressed items, striking through items no longer needed, adding new items, and warning if changes can't be verified.
• Modified the comment format example to include sticky comment conventions, such as strikethrough for reverted items, checkboxes for addressed items, and warnings for unverifiable documentation changes.
• Ensured the <!-- doc-check-sticky --> marker is placed at the end of the comment for easier identification and updates in future runs.