What steps can I take to resolve the issue caused by GitHub's certificate/key change?

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If you are experiencing issues with GitHub's certificate/key change, here are some steps you can take to resolve the issue:

1. Ensure that you have the latest version of Git installed on your system. Older versions may not be compatible with the updated certificate.

2. Update the CA certificates on your system. Depending on your operating system, this can be done using the appropriate package manager or manually downloading and installing the updated certificate from a trusted source.

3. Verify that your Git configuration is correct. Check if the git config file contains the correct SSL verification settings.

4. Disable SSL verification temporarily to see if it resolves the issue. This is not recommended for long-term use, but it can help diagnose the issue.

5. Contact GitHub support. If none of the above steps work, it may be necessary to reach out to GitHub's support team for further assistance or to report the issue.