docs: add 3 behavior examples to Code of Conduct

[repeat-Q]

Description

This PR adds 3 specific examples to the "Our Standards" section of the Code of Conduct, supplementing both acceptable and unacceptable behavior guidelines.

Added Examples

Acceptable Behavior (2 items):

• Proactively offering help to new contributors
• Keeping discussions focused on ideas and solutions rather than personal attributes

Unacceptable Behavior (1 item):

• Deliberately undermining or dismissing others' contributions

Motivation

The original behavior guidelines are clear but lack concrete scenarios. Adding these examples helps reduce ambiguity for community members (especially new contributors), making it easier to understand and follow the expected norms in collaboration.

Checklist

• My changes follow the existing style and tone of the Code of Conduct
• The added examples are not duplicate with existing content
• The modifications are relevant to open source community collaboration scenarios
• I have read the project's Contributing Guidelines (if any)

[Copilot]

Pull request overview

This PR enhances the Code of Conduct by adding three concrete behavioral examples to help community members better understand expected conduct. The additions provide specific, actionable guidance that complements the existing general principles.

Key Changes:

• Added two examples of acceptable behavior that emphasize proactive support and constructive communication
• Added one example of unacceptable behavior addressing dismissive conduct toward contributions

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[repeat-Q]

Hi maintainers,
As a community member, I am pleased to submit this pull request. My primary objective is to supplement the Code of Conduct with several specific examples, aiming to enhance the actionability of the behavior guidelines for all contributors. Additionally, this submission serves as a learning opportunity for me to familiarize myself with the open source contribution process, particularly pull request submissions.
I have ensured that my modifications align with the existing style and scope of the project. I look forward to your review feedback and hope this pull request can be merged successfully. Thank you for your time and efforts in the review process.