Documentation outdated

https://arrow.juliadata.org/dev/

I don't see for example, this part of the doc:

Lines 232 to 234 in adf6ab8

    
           ### `Arrow.Writer` 
        
           With `Arrow.Writer`, you instantiate an `Arrow.Writer` object, write sources using it, and then close it.  This allows for incrmental writes to the same sink.  It is similar to `Arrow.append` without having to close and re-open the sink in between writes and without the limitation of only supporting the IPC stream format.

Related to #370 I believe

I thinks this PR should fix doc deployment

	### `Arrow.Writer`

	With `Arrow.Writer`, you instantiate an `Arrow.Writer` object, write sources using it, and then close it. This allows for incrmental writes to the same sink. It is similar to `Arrow.append` without having to close and re-open the sink in between writes and without the limitation of only supporting the IPC stream format.