added keepalive=false in createRequest

[dsawali]

closes #2973

• updated taquito-http-util fetch call to include keepalive=false. Node 19 onwards now defaults keepalive to true, which were causing the socket hangup errors

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[hui-an-yang]

lgtm, would be nice to also update the doc docs/cancel_http_requests.md line45 with the change and have example in release note too.