Fix Comment Mismatch Update cache-config.ts

[defitricks]

In the code, there was a mismatch between the comment and the actual value used for the v2UntrackedUsdThreshold. The comment stated:

// Pairs need at least 1K USD (untracked) to be selected (for metrics only)

However, the value assigned to v2UntrackedUsdThreshold is:

const v2UntrackedUsdThreshold = Number.MAX_VALUE

This discrepancy creates confusion, as Number.MAX_VALUE is effectively an extremely large value, not 1K USD. To resolve this and accurately reflect the code's behavior, the comment has been updated to:

// Pairs are effectively excluded due to an untracked USD threshold of Number.MAX_VALUE

This update aligns the comment with the actual functionality and makes the code clearer.