Internal: upgrade netlify-cli to 8.19.3

[dangerismycat]

Addressing this high severity Dependabot alert

We need to upgrade to the latest version of netlify-cli, if possible

Previous upgrades: 2.x.x --> 3.x.x: #3362 3.x.x --> 4.x.x: #3364 4.x.x --> 6.x.x: #3366 6.x.x --> 7.x.x: #3368

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