polkadot/zombienet_tests/smoke/0004-coretime-smoke-test.zndsl still
timeouts on CI from time to time. Bumping the timeout a bit more.

Related to https://github.com/paritytech/polkadot-sdk/issues/6226

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Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>