gpu: document 7.79.0 system-probe workaround

[matthewnewman43]

Documents the Agent v7.79.0 workaround for GPU Monitoring: set gpu_monitoring.system_probe_deprecated: true in system-probe.yaml.

What does this PR do? What is the motivation?

Adds a sub-bullet under Minimum version requirements on the GPU Monitoring setup page covering an Agent v7.79.0 edge case that requires a system-probe config change.

This sits alongside the existing v7.82.0 kernel-panic clause rather than replacing it — the two are separate issues.

Paired with: web-ui#340804 — the in-product banner asserting the same claim, behind gpu-monitoring-agent-version-779-deprecation. Both were produced by the gpu-monitoring-public-doc-changes skill (web-ui#340806).

Merge readiness

• Ready for merge

Not ready to merge. The symptom wording ("a known issue affecting GPU Monitoring") is a placeholder pending a precise description of the failure mode. Do not merge until that is replaced.

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AI assistance

Drafted with Claude Code, which located the target section, checked the wording against the repo style guide, and prepared the paired in-product change. Reviewed by a human before submission.

Additional notes

The value is true (enabling a system_probe_deprecated flag), not false — worth a second look from someone who knows the Agent-side semantics.

[github-actions]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/matthew.newman/gpu-779-system-probe-deprecated/gpu_monitoring/setup