fix(zombienet): increase timeout in download artifacts (paritytech#3376)

Fix timeouts downloading the artifacts (e.g
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/5246040)
Thx!

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Co-authored-by: Bastian Köcher <git@kchr.de>

polkadot/zombienet_tests/misc/0002-upgrade-node.zndsl

@@ -10,9 +10,8 @@ dave: parachain 2001 block height is at least 10 within 200 seconds
 # POLKADOT_PR_ARTIFACTS_URL=https://gitlab.parity.io/parity/mirrors/polkadot/-/jobs/1842869/artifacts/raw/artifacts
 # with the version of polkadot you want to download.
 
-# avg 30s in our infra
-alice: run ./0002-download-polkadot-from-pr.sh with "{{POLKADOT_PR_ARTIFACTS_URL}}" within 60 seconds
-bob: run ./0002-download-polkadot-from-pr.sh with "{{POLKADOT_PR_ARTIFACTS_URL}}" within 60 seconds
+alice: run ./0002-download-polkadot-from-pr.sh with "{{POLKADOT_PR_ARTIFACTS_URL}}" within 240 seconds
+bob: run ./0002-download-polkadot-from-pr.sh with "{{POLKADOT_PR_ARTIFACTS_URL}}" within 240 seconds
 # update the cmd to add the flag '--insecure-validator-i-know-what-i-do'
 # once the base image include the version with this flag we can remove this logic.
 alice: run ./0002-update-cmd.sh within 60 seconds