ARROW-14657: [R][Docs] Broken link in R docs
ARROW-14657: [R][Docs] Broken link in R docs

Closes #11660 from thisisnic/ARROW-14657_link

Authored-by: Nic Crane <b130ca97a5c118d9797a8d384d7c894a28655aef@gmail.com>
Signed-off-by: Nic Crane <b130ca97a5c118d9797a8d384d7c894a28655aef@gmail.com>

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