Update copyright year from 2025 to 2026 in README

[himanshujays29]

Describe the bug

The README displays an outdated copyright year (2025) for CircuitVerse.
Since the project is actively maintained in 2026, the year should be updated to reflect the current year.

To Reproduce

Steps to reproduce the behavior:

1. Go to the project repository.
2. Open the README.md file.
3. Scroll down to the footer section.
4. Observe the text showing © 2025 by CircuitVerse.

Expected behavior

The README should display the updated year © 2026 by CircuitVerse.

Screenshots

If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Chrome
• Version: Latest

Smartphone (please complete the following information):

• Device: N/A
• OS: N/A
• Browser: N/A
• Version: N/A

Additional context

This is a minor documentation bug, but keeping the copyright year updated helps maintain accuracy in the project.