Fix TLS 1.2 negotiation in Test-ListPath.ps1

[larsct]

Description

Fixes #1131

Adds explicit TLS 1.2 support to Test-ListPath.ps1, mirroring the existing pattern already used in Test-ModsPath.ps1.

Problem

When fetching the excluded apps list from a remote URL behind a corporate proxy, the function fails with a TLS negotiation error. The root cause is that SystemDefault does not reliably negotiate TLS 1.2 through corporate proxies.

Solution

Added [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 — the same fix already present in Test-ModsPath.ps1.

Testing

Verified in a corporate proxy environment where the issue was reproduced and resolved with this change.

[github-actions]

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