chore(deps): update henrygd/beszel-agent docker tag to v0.4.0

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This PR contains the following updates:

Package	Update	Change
henrygd/beszel-agent	minor	0.3.0 -> 0.4.0

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Release Notes

henrygd/beszel (henrygd/beszel-agent)

v0.4.0

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New features

• Notifications via Ntfy, Telegram, Discord, and other services, using Shoutrrr integration.
• New NICS environment variable to specify a whitelist of network interfaces to monitor.
• Ability to override the root filesystem disk usage stats (see below).
• Allow users to change or add email addresses for alert notifications.
• Allow users to change the default time range for charts.
• Display hostname in system information if it's different than the host or name.

Changes to FILESYSTEM

If the FILESYSTEM environment variable is set, the agent now looks for an associated mount point and uses that for root disk usage stats. Previously the 'root partition' always used / as the mount point.

This gives you the ability to change the root partition if needed, and insures the I/O stats will accurately reflect the correct partition if a mount point is accessible.

Depending on your configuration, there's a small chance this will immediately change the values for root disk usage, which could result in a funky chart until the previous values age out.

New Contributors

• @​crypt0rr made their first contribution in https://github.com/henrygd/beszel/pull/156
• @​parnic made their first contribution in https://github.com/henrygd/beszel/pull/145

Full Changelog: henrygd/beszel@v0.3.0...v0.4.0

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