ARROW-16375: [R][CI] Pin test-r-devdocs on Windows to R 4.1
ARROW-16375: [R][CI] Pin test-r-devdocs on Windows to R 4.1

Closes #13011 from thisisnic/ARROW-16375_pin_build_4.1

Lead-authored-by: Nic Crane <b130ca97a5c118d9797a8d384d7c894a28655aef@gmail.com>
Co-authored-by: Nicola Crane <b130ca97a5c118d9797a8d384d7c894a28655aef@gmail.com>
Signed-off-by: Nic Crane <b130ca97a5c118d9797a8d384d7c894a28655aef@gmail.com>

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