chore: Update testcase for incoming spce changes

[shrutiburman]

Fixes

Testcase update- https://buildkite.com/twilio/twilio-librarian-status-checks/builds/43758#019bb5dd-5185-4272-90c1-1126766913dd/L230
Updating Dial.sip call to use keyword arguments instead of a positional argument: sip_url
This might fail right now but will be fixed after new spec generation via internal repo api-defs PR- api-definitions/pull/5115

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