Protect: Fix blockedRequests destructuring fallback

[dkmyta]

Fixes #
When blockedRequests property is not set in the initial state we should fallback to returning 0 for each stat, with the current configuration it will error out

Proposed changes:

• Fix prop naming the destructuring process to supply a valid fallback

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

• https://github.com/Automattic/jetpack-scan-team/issues/1447

Does this pull request change what data or activity we track or use?

• No

Testing instructions:

• Using Jurassic Tube on the trunk version of Protect
• Update line 134 of the ConnectedFirewallHeader component update the property value to force the fallback and verify the error occurs
• Checkout this branch and ensure the error no longer occurs and that the StatCard renders 0 for each stat

[github-actions]

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[nateweller]

LGTM 👍