[DOC] Potentially misleading/missing documentation regarding compatibility of Radial Search with different space types

[mike-psyllakis]

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There is insufficient documentation regarding which spaces are compatible with radial search.
This section is slightly misleading.

The linked section about spaces lists hamming as a space type.

Binary data is not supported however as indicated by the following error:
RequestError(400, 'search_phase_execution_exception', 'unsupported_operation_exception: Binary data type does not support radial search')

My tests have shown that float and byte vectors are supported but not binary.

Version: 2.7.1