chore: lower c2 blocklist fetch interval

[AugmentedMode]

Explanation

The current C2 domain blocklist fetch interval is set to 15 minutes. After discussing with Samczsun, we determined it's best to lower this interval, as drainers have started switching C2s more quickly since C2 detection was rolled out.

This update only affects the fetch interval for the C2 blocklist.

References

Changelog

@metamask/phishing-controller

• CHANGED: Lowered the C2_DOMAIN_BLOCKLIST_REFRESH_INTERVAL from 15 minutes to 5 minutes.

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes