chore: bump version to 2.2.4

[sarve-shreyas]

Stacked on #492. Merge that first. GitHub will then retarget this PR to main.

Bumps the version 2.2.3 → 2.2.4 in package.json, package-lock.json and server.json, the same three files as the 2.2.3 bump (#482). The release carries #492, which adds a11y back as an askBrowserStackAI product.

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