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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
```

- **Problem Statement:** 
  - Issue with the call hash `0x89bc47197f1b38422de2b34db03f29d935879ed00b18c0c913e0c751d30f7cf1` on https://polkadot.subsquare.io/referenda/referendum/51.

- **Significance:** 
  - Ensuring the accuracy and integrity of the call hash for the specified referendum.

- **Proposed Solution:** 
  - Whitelisting the provided call hash and its preimage.

- **Expected Outcomes:** 
  - Verification and validation of the call hash to maintain the referendum's integrity.

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