fix: records of pick callback in dns interceptor is a nested object

[EAGzzyCSL]

This relates to...

fix d.ts of dns interceptor['pick']

Rationale

the parameter records pass to pick is from this.#records, ref code

ths.#records is a map with type Record<string, {records: {4: { ips: DNSInterceptorRecord[] } , 6: ...}}>, ref code

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