fix(rmlink): fix rmlink to match docs

[caleb-mabry]

Resolves #3815 The test provided for rmlink has the object structured as: https://github.com/ipfs/js-ipfs/blob/master/packages/interface-ipfs-core/src/object/patch/rm-link.js#L49-L55

const childAsDAGLink = {
   Name: 'my-link',
   Tsize: childBuf.length,
   Hash: CID.createV0(await sha256.digest(childBuf))
}

While the documentation has it defined as:

const cid = await ipfs.object.patch.rmLink(node, {
  name: 'some-link',
  size: 10,
  cid: CID.parse('QmPTkMuuL6PD8L2SwTwbcs1NPg14U8mRzerB1ZrrBrkSDD')
})

Method has been updated to match the variable names in the documentation and the example has been altered to match the example in the test case.

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