fix(soulmask): add missing pigz package to dependencies

[intel44]

Description

add missing pigz package to dependencies. Required for backup

Fixes #4604

Type of change

• Bug fix (a change which fixes an issue).
• New feature (a change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Comment update (typo, spelling, explanation, examples, etc).

Checklist

PR will not be merged until all steps are complete.

• This pull request links to an issue.
• This pull request uses the develop branch as its base.
• This pull request subject follows the Conventional Commits standard.
• This code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have checked that this code is commented where required.
• I have provided a detailed enough description of this PR.
• I have checked if documentation needs updating.

[MicLieg]

Thank you for the PR but it looks like pigz was already a part of the required dependencies for all games: https://github.com/GameServerManagers/LinuxGSM/blob/master/lgsm/data/ubuntu-24.04.csv#L1C136-L1C140

Now it's listed redundantly for Soulmask.

[intel44]

Pkg already as global requirements for lgsm, i close (info #4604 (comment))

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.