Bump a timeout in zombienet coretime smoke test (#6268)

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

---------

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>

polkadot/zombienet_tests/smoke/0004-coretime-smoke-test.zndsl

@@ -9,7 +9,7 @@ coretime-collator: is up
 alice: js-script ./0004-configure-relay.js with "" return is 0 within 600 secs
 
 # Coretime chain should be producing blocks when the extrinsic is sent
-alice: parachain 1005 block height is at least 10 within 120 seconds
+alice: parachain 1005 block height is at least 10 within 180 seconds
 
 # configure broker chain
 coretime-collator: js-script ./0004-configure-broker.js with "" return is 0 within 600 secs

prdoc/pr_6268.prdoc

+title: Bump a timeout in zombienet coretime smoke test
+doc:
+- audience: Node Dev
+  description: |-
+    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
+crates:
+- name: polkadot
+  bump: none