Inaccurate code comments on method ExecuteTo

[Phil-CST-BCIT]

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Link

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https://github.com/supabase-community/postgrest-go/blob/main/querybuilder.go#L44

Describe the problem

Is the documentation missing? Or is it confusing? Why is it confusing?

The comments on the method func (q *QueryBuilder) ExecuteTo(to interface{}) state that the acceptable argument to is always a slice, but this is not true if the user specifies vnd.pgrst.object to be part of the Accept header (see: https://docs.postgrest.org/en/v12/references/api/resource_representation.html#singular-or-plural).

Describe the improvement

A clear and concise description of the improvement.

Update the current comments to capture the fact:

// interface. Note that the argument for the to parameter should always be a
// reference to a slice unless the method Single is specified.

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