[Fellows] Referendum #2: Whitelist System Parachain HRMP Channels

Whitelist for https://polkadot.subsquare.io/referenda/referendum/51

The call hash that this whitelists is 0x89bc47197f1b38422de2b34db03f29d935879ed00b18c0c913e0c751d30f7cf1.

The preimage for this hash is:

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