fix: fetch latest polkadot releases #108
Merged
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We are fetching the latest polkadot version from https://github.com/paritytech/polkadot-sdk/releases,
Latest release there is a Polkadot Parachain release, and this was making the tool fail because we are trying to get a version of Polkadot that doesn't exist:
The workaround suggested in this PR: fetch the latest n (5 in this case) versions and iterate to find the Polkadot version.