[Change] Clarify need for index parameter on reorder_chunks()

[tylerfontaine]

Describe the change The API Reference for reorder_chunk() lists index as an optional parameter; however, the first time a chunk is reordered, supplying that index is required.

This either needs clarification, or the index parameter should be marked as something other than optional.

This may also require clarification on move_chunk as well, since unre-ordered chunks that you attempt to move need the reorder_index parameter set as well.

Location(s) https://docs.timescale.com/latest/api#reorder_chunk https://docs.timescale.com/latest/api#move_chunk