Updating code of conduct Bulgarian translation

[nate-double-u]

Updating Bulgarian translation.

The CNCF has had a professional translation service provide this version of the code of conduct in Bulgarian.

Deploy preview: https://github.com/nate-double-u/cncf-foundation/blob/2024-02-09-NW-code-of-conduct-translation-update-Bulgarian/code-of-conduct-languages/bg.md

Note: I didn't do the translation on this (just providing the markdown), but comments are welcome!

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