fix: fix regex to get vfs details properly

[lkleinax]

This pull request makes a targeted improvement to the regular expression used for parsing virtual function (VF) details in the Linux virtualization network interface code. The update ensures the code can handle both "link/ether" and "MAC" as possible labels for MAC addresses in the output of the ip link show command.

Parsing robustness:

• Updated the regular expression in _get_vfs_details within linux.py to accept both link/ether and MAC as valid MAC address labels, improving compatibility with different output formats from ip link show.

[Copilot]

Pull Request Overview

This PR fixes a regex pattern used to parse VF (Virtual Function) details from network interface information. The fix addresses issue #29 by making the pattern more flexible to handle different output formats from the ip link show command.

Key Change:

• Modified the regex pattern to accept both "link/ether" and "MAC" as valid prefixes before the MAC address field in VF details parsing

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