fix: use an indepentant URL for checking internet connectivtiy

[DeepDiver1975]

Description

Related Issue

• Fixes Integrity check fails in pure IPv6 networks #41465

Motivation and Context

How Has This Been Tested?

• test environment:
• test case 1:
• test case 2:
• ...

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[kw-ftaeger]

Could this maybe be a list of multiple hostnames where at least one of them required to be reachable? This would allow to circumvent individual destination to be offline and therefore create friction by something the admin of a system doesn't control.

[DeepDiver1975]

for the sake of simplicity I'd like to keep it this way. In 12+y there was no need to ever change this url or even have it configurable. We should be save ;-)