Updated date, and changed wording around examples of unacceptable behaviour.

Revise code of conduct for enhanced clarity, inclusivity, and accountability

In response to valuable feedback from community members and in alignment with our ongoing commitment to creating a safe and welcoming space for collaboration, this commit refines the code of conduct. The changes focus on:

• Clarity: Rewording sections to eliminate ambiguity and ensure that expectations are clearly communicated.
• Inclusivity: Adding language to emphasize our dedication to diversity and inclusion, and providing examples to illustrate the types of behavior we encourage.

These updates aim to foster a more positive and collaborative atmosphere within our community. Please review the changes and don't hesitate to provide further input or suggestions.

Note that the patches should be read as a whole; I'm still learning git and using the gitlab UI, which doesn't have a way to do history editing.