minor #11928 Adding select type to doc (moein)
minor #11928 Adding select type to doc (moein)

This PR was merged into the 1.7-dev branch.

Discussion
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I was looking into adding a select type field and I saw that type was added 3 years ago in https://github.com/Sylius/Sylius/pull/4397 but the doc was not updated

| Q               | A
| --------------- | -----
| Branch?         | master
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Related tickets | https://github.com/Sylius/Sylius/pull/4397
| License         | MIT


Commits
-------

90434f6f2781cfcf8abeb7e2ae9d49d97877cecc Update attributes.rst

Arminek/Sylius,lchrusciel/Sylius,lchrusciel/Sylius,antonioperic/Sylius,SyliusBot/Sylius,101medialab/Sylius,SyliusBot/Sylius,GSadee/Sylius,loic425/Sylius,GSadee/Sylius,GSadee/Sylius,diimpp/Sylius,loic425/Sylius,101medialab/Sylius,kayue/Sylius,101medialab/Sylius,Arminek/Sylius,kayue/Sylius,antonioperic/Sylius,kayue/Sylius,loic425/Sylius,SyliusBot/Sylius,Zales0123/Sylius,diimpp/Sylius,Sylius/Sylius,Zales0123/Sylius,Sylius/Sylius,Arminek/Sylius,lchrusciel/Sylius,pamil/Sylius,Zales0123/Sylius,pamil/Sylius,Sylius/Sylius,pamil/Sylius,diimpp/Sylius,antonioperic/Sylius